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/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:50:23,514 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:50:23,519 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:50:23,534 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:50:23,534 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:50:23,535 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:50:23,536 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:50:23,538 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:50:23,539 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:50:23,540 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:50:23,541 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:50:23,568 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:50:23,582 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:50:23,583 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:50:23,584 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:50:23,584 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:50:23,584 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:50:23,585 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:50:23,585 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:50:23,585 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:50:23,585 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:50:23,585 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:50:23,586 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:50:23,586 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:50:23,586 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:50:23,586 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:50:23,586 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:50:23,586 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:50:23,587 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:50:23,587 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:50:23,587 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:50:23,587 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:50:23,587 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:50:23,588 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:50:23,588 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:50:23,588 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:50:23,588 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:50:23,588 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:50:23,589 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:50:23,589 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:50:23,589 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:50:23,589 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:50:23,633 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:50:23,647 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:50:23,653 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:50:23,659 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:50:23,659 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:50:23,660 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-09-23 19:50:23,661 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-09-23 19:50:23,711 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:50:23,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:50:23,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:50:23,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:50:23,718 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:50:23,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:23" (1/1) ... [2018-09-23 19:50:23,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:23" (1/1) ... [2018-09-23 19:50:23,759 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:50:23,759 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:50:23,760 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:50:23,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:50:23,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:50:23,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:50:23,764 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:50:23,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:23" (1/1) ... [2018-09-23 19:50:23,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:23" (1/1) ... [2018-09-23 19:50:23,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:23" (1/1) ... [2018-09-23 19:50:23,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:23" (1/1) ... [2018-09-23 19:50:23,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:23" (1/1) ... [2018-09-23 19:50:23,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:23" (1/1) ... [2018-09-23 19:50:23,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:23" (1/1) ... [2018-09-23 19:50:23,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:50:23,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:50:23,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:50:23,795 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:50:23,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:50:23,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 19:50:23,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 19:50:23,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 19:50:24,060 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:50:24,061 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:50:24 BoogieIcfgContainer [2018-09-23 19:50:24,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:50:24,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:50:24,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:50:24,065 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:50:24,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:50:23" (1/2) ... [2018-09-23 19:50:24,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fdfe40 and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:50:24, skipping insertion in model container [2018-09-23 19:50:24,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:50:24" (2/2) ... [2018-09-23 19:50:24,069 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-09-23 19:50:24,079 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:50:24,087 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:50:24,141 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:50:24,142 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:50:24,142 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:50:24,142 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:50:24,143 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:50:24,143 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:50:24,143 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:50:24,143 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:50:24,143 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:50:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 19:50:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:50:24,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:24,176 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:50:24,179 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:24,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:24,188 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-23 19:50:24,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:24,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:24,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:24,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,337 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:50:24,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 19:50:24,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:50:24,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:50:24,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:50:24,357 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 19:50:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:24,426 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:50:24,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:50:24,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 19:50:24,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:24,440 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:50:24,440 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 19:50:24,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:50:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 19:50:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 19:50:24,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 19:50:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 19:50:24,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-23 19:50:24,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:24,505 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 19:50:24,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:50:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 19:50:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:50:24,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:24,509 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-23 19:50:24,509 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:24,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-23 19:50:24,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:24,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:24,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:24,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:24,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:24,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:24,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:24,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-23 19:50:24,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:50:24,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:50:24,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:50:24,813 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-23 19:50:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:24,872 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 19:50:24,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:50:24,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-23 19:50:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:24,874 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:50:24,874 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:50:24,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:50:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:50:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:50:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:50:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 19:50:24,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-23 19:50:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:24,879 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 19:50:24,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:50:24,879 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 19:50:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:50:24,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:24,880 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-23 19:50:24,880 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:24,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:24,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-23 19:50:24,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:24,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:24,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:24,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:25,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:25,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:25,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:25,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:25,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:25,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-23 19:50:25,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:50:25,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:50:25,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:50:25,246 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-23 19:50:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:25,352 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:50:25,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:50:25,353 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-23 19:50:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:25,354 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:50:25,354 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:50:25,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:50:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:50:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:50:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:50:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 19:50:25,359 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-23 19:50:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:25,359 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 19:50:25,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:50:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 19:50:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:50:25,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:25,360 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-23 19:50:25,361 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:25,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-23 19:50:25,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:25,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:25,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:25,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:25,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:25,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:25,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:50:25,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:25,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:25,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-23 19:50:25,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:25,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:25,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:25,758 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-23 19:50:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:25,812 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:50:25,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:50:25,813 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-23 19:50:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:25,814 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:50:25,814 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:50:25,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:25,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:50:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 19:50:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:50:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 19:50:25,819 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-23 19:50:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:25,820 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 19:50:25,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 19:50:25,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:50:25,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:25,821 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-23 19:50:25,821 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:25,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:25,821 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-23 19:50:25,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:25,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:25,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:25,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:25,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:26,000 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:26,006 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:26,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:26,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:26,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-23 19:50:26,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:50:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:50:26,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:50:26,163 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-23 19:50:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:26,232 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:50:26,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:50:26,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-23 19:50:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:26,233 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:50:26,233 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:50:26,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:50:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:50:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:50:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:50:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 19:50:26,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-23 19:50:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:26,239 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 19:50:26,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:50:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 19:50:26,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:50:26,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:26,240 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-23 19:50:26,240 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:26,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:26,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-23 19:50:26,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:26,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:26,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:26,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:26,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:26,620 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:26,691 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:50:26,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:26,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:26,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-23 19:50:26,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:50:26,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:50:26,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:50:26,853 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-23 19:50:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:26,947 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:50:26,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:50:26,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 19:50:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:26,948 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:50:26,948 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:50:26,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:50:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:50:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:50:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:50:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 19:50:26,953 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-23 19:50:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:26,953 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 19:50:26,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:50:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 19:50:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:26,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:26,955 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-23 19:50:26,956 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:26,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-23 19:50:26,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:26,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:26,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:26,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:27,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:27,089 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:27,097 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:50:27,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:27,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:27,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-23 19:50:27,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:50:27,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:50:27,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:50:27,310 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-23 19:50:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:27,369 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:50:27,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:27,370 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-23 19:50:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:27,371 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:50:27,371 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:50:27,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:50:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:50:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 19:50:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:50:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 19:50:27,377 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-23 19:50:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:27,378 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 19:50:27,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:50:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 19:50:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:27,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:27,379 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-23 19:50:27,379 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:27,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-23 19:50:27,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:27,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:27,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:27,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:27,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:27,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:27,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:27,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-23 19:50:27,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:50:27,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:50:27,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:50:27,918 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-23 19:50:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:27,975 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:50:27,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:27,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-23 19:50:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:27,977 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:50:27,977 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:50:27,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:50:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:50:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 19:50:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:50:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 19:50:27,982 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-23 19:50:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:27,983 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 19:50:27,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:50:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 19:50:27,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:50:27,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:27,984 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-23 19:50:27,984 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:27,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:27,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-23 19:50:27,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:27,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:27,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:27,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:28,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:28,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:28,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:28,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:28,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:28,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-23 19:50:28,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:50:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:50:28,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:50:28,346 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-23 19:50:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:28,427 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:50:28,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:50:28,428 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-23 19:50:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:28,429 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:50:28,429 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:50:28,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:50:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:50:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 19:50:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:50:28,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 19:50:28,435 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-23 19:50:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:28,435 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 19:50:28,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:50:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 19:50:28,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:50:28,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:28,436 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-23 19:50:28,436 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:28,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:28,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-23 19:50:28,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:28,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:28,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:28,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:28,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:28,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:28,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:28,636 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 19:50:28,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:28,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:28,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-23 19:50:28,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:50:28,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:50:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:50:28,868 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-23 19:50:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:29,137 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:50:29,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:50:29,138 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-23 19:50:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:29,139 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:50:29,139 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:50:29,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:50:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:50:29,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 19:50:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:50:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 19:50:29,149 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-23 19:50:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:29,149 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 19:50:29,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:50:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 19:50:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:50:29,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:29,151 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-23 19:50:29,151 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:29,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:29,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-23 19:50:29,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:29,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:29,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:29,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:29,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:29,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:29,368 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:29,377 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:29,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:29,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:29,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:29,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-23 19:50:29,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:50:29,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:50:29,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:50:29,613 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-23 19:50:29,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:29,676 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:50:29,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:50:29,677 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-23 19:50:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:29,678 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:50:29,679 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:50:29,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:50:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:50:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 19:50:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 19:50:29,684 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-23 19:50:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:29,685 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 19:50:29,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:50:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 19:50:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:50:29,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:29,686 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-23 19:50:29,686 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:29,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:29,687 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-23 19:50:29,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:29,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:29,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:29,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:29,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:29,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:29,858 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:29,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 19:50:29,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:29,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:30,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:30,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-23 19:50:30,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:50:30,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:50:30,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:50:30,385 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-23 19:50:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:30,485 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:50:30,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:50:30,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-23 19:50:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:30,487 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:50:30,487 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:50:30,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:50:30,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:50:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 19:50:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 19:50:30,493 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-23 19:50:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:30,493 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 19:50:30,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:50:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 19:50:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 19:50:30,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:30,494 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-23 19:50:30,494 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:30,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:30,495 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-23 19:50:30,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:30,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:30,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:30,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:30,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:30,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:30,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:30,838 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:30,873 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:50:30,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:30,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:31,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:31,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-23 19:50:31,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:50:31,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:50:31,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:50:31,158 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-23 19:50:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:31,224 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:50:31,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:50:31,226 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-23 19:50:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:31,227 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:50:31,227 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:50:31,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:50:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:50:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 19:50:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 19:50:31,232 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-23 19:50:31,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:31,233 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 19:50:31,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:50:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 19:50:31,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:50:31,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:31,234 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-23 19:50:31,234 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:31,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:31,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-23 19:50:31,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:31,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:31,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:31,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:31,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:31,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:31,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:31,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:31,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:31,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-23 19:50:31,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:50:31,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:50:31,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:50:31,821 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-23 19:50:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:31,905 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:50:31,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:50:31,905 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-23 19:50:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:31,906 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:50:31,906 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:50:31,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:50:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:50:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 19:50:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 19:50:31,912 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-23 19:50:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:31,912 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 19:50:31,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:50:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 19:50:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 19:50:31,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:31,915 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-23 19:50:31,915 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:31,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:31,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-23 19:50:31,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:31,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:31,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:31,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:32,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:32,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:32,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:32,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:32,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:32,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:32,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:32,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-23 19:50:32,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:50:32,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:50:32,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:50:32,600 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-23 19:50:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:32,695 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:50:32,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:50:32,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-23 19:50:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:32,697 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:50:32,697 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:50:32,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:50:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:50:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 19:50:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:50:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 19:50:32,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-23 19:50:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:32,703 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 19:50:32,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:50:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 19:50:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:50:32,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:32,704 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-23 19:50:32,705 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:32,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-23 19:50:32,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:32,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:32,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:32,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:32,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:32,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:32,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:32,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:33,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 19:50:33,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:33,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:33,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-23 19:50:33,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:50:33,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:50:33,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:50:33,578 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-23 19:50:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:33,716 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:50:33,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:50:33,716 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-23 19:50:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:33,717 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:50:33,717 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:50:33,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:50:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:50:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 19:50:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:50:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 19:50:33,723 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-23 19:50:33,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:33,723 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 19:50:33,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:50:33,723 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 19:50:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:50:33,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:33,724 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-23 19:50:33,724 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:33,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:33,725 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-23 19:50:33,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:33,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:33,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:33,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:33,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:33,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:33,944 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:33,955 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:33,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:33,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:34,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:34,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-23 19:50:34,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:50:34,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:50:34,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:50:34,252 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-23 19:50:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:34,327 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:50:34,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:50:34,327 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-23 19:50:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:34,328 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:50:34,328 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:50:34,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:50:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:50:34,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 19:50:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:50:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 19:50:34,334 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-23 19:50:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:34,334 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 19:50:34,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:50:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 19:50:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 19:50:34,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:34,335 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-23 19:50:34,336 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:34,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:34,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-23 19:50:34,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:34,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:34,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:34,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:34,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:34,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:34,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:34,799 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:34,818 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 19:50:34,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:34,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:35,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:35,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-23 19:50:35,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:50:35,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:50:35,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:50:35,295 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-23 19:50:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:35,555 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:50:35,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:50:35,556 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-23 19:50:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:35,557 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:35,557 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:50:35,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:50:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:50:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:50:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:50:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 19:50:35,564 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-23 19:50:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:35,564 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 19:50:35,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:50:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 19:50:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 19:50:35,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:35,566 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-23 19:50:35,566 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:35,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:35,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-23 19:50:35,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:35,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:35,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:35,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:36,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:36,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:36,143 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:36,161 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:50:36,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:36,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:36,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:36,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-23 19:50:36,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:50:36,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:50:36,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:50:36,966 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-23 19:50:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:37,053 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:50:37,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:50:37,053 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-23 19:50:37,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:37,054 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:37,054 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 19:50:37,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:50:37,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 19:50:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 19:50:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 19:50:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 19:50:37,058 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-23 19:50:37,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:37,059 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 19:50:37,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:50:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 19:50:37,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 19:50:37,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:37,060 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-23 19:50:37,060 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:37,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:37,060 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-23 19:50:37,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:37,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:37,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:37,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:37,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:37,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:37,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:37,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:37,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:38,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:38,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-23 19:50:38,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:50:38,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:50:38,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:50:38,387 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-23 19:50:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:38,524 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:50:38,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:50:38,524 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-23 19:50:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:38,525 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:38,525 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 19:50:38,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:50:38,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 19:50:38,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 19:50:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:50:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 19:50:38,531 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-23 19:50:38,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:38,531 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 19:50:38,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:50:38,532 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 19:50:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:50:38,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:38,532 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-23 19:50:38,533 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:38,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:38,533 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-23 19:50:38,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:38,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:38,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:38,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:38,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:39,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:39,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:39,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:39,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:39,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:39,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:40,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:40,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-23 19:50:40,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:50:40,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:50:40,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:50:40,218 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-23 19:50:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:40,321 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:50:40,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:50:40,322 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-23 19:50:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:40,323 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:40,323 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 19:50:40,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:50:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 19:50:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 19:50:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:50:40,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 19:50:40,329 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-23 19:50:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:40,330 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 19:50:40,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:50:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 19:50:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 19:50:40,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:40,331 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-23 19:50:40,331 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:40,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:40,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-23 19:50:40,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:40,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:40,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:40,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:40,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:41,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:41,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:41,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:41,323 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 19:50:41,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:41,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:41,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:41,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-23 19:50:41,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:50:41,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:50:41,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:50:41,725 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-23 19:50:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:41,871 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 19:50:41,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:50:41,874 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-23 19:50:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:41,875 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:41,875 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 19:50:41,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:50:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 19:50:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 19:50:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 19:50:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 19:50:41,880 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-23 19:50:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:41,881 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 19:50:41,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:50:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 19:50:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 19:50:41,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:41,882 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-23 19:50:41,882 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:41,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-23 19:50:41,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:41,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:41,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:41,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:41,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:42,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:42,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:42,425 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:42,440 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:42,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:42,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:43,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:43,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-23 19:50:43,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:50:43,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:50:43,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:50:43,019 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-23 19:50:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:43,127 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 19:50:43,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:50:43,128 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-23 19:50:43,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:43,129 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:43,129 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:50:43,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:50:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:50:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 19:50:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 19:50:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 19:50:43,135 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-23 19:50:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:43,135 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 19:50:43,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:50:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 19:50:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 19:50:43,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:43,136 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-23 19:50:43,137 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:43,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-23 19:50:43,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:43,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:43,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:43,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:43,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:43,558 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:43,582 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 19:50:43,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:43,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:44,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:44,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-23 19:50:44,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:50:44,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:50:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:50:44,087 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-23 19:50:44,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:44,212 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 19:50:44,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:50:44,212 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-23 19:50:44,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:44,213 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:50:44,213 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 19:50:44,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:50:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 19:50:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 19:50:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 19:50:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 19:50:44,222 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-23 19:50:44,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:44,223 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 19:50:44,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:50:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 19:50:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 19:50:44,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:44,224 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-23 19:50:44,224 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:44,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:44,224 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-23 19:50:44,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:44,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:44,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:44,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:44,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:44,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:44,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:44,631 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:44,658 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:50:44,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:44,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:45,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:45,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-23 19:50:45,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:50:45,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:50:45,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:50:45,101 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-23 19:50:45,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:45,250 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 19:50:45,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:50:45,251 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-23 19:50:45,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:45,252 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:50:45,252 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 19:50:45,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:50:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 19:50:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 19:50:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:50:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 19:50:45,257 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-23 19:50:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:45,257 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 19:50:45,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:50:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 19:50:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:50:45,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:45,258 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-23 19:50:45,258 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:45,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:45,258 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-23 19:50:45,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:45,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:45,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:45,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:45,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:45,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:45,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:45,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:46,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:46,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-23 19:50:46,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:50:46,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:50:46,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:50:46,215 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-23 19:50:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:46,343 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 19:50:46,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:50:46,344 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-23 19:50:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:46,345 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:50:46,345 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 19:50:46,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:50:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 19:50:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 19:50:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 19:50:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 19:50:46,352 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-23 19:50:46,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:46,352 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 19:50:46,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:50:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 19:50:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 19:50:46,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:46,354 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-23 19:50:46,354 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:46,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-23 19:50:46,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:46,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:46,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:46,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:46,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:46,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:46,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:46,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:46,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:46,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:46,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:47,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:47,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-23 19:50:47,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:50:47,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:50:47,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:50:47,531 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-23 19:50:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:47,715 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 19:50:47,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:50:47,715 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-23 19:50:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:47,716 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:50:47,716 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:50:47,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:50:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:50:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 19:50:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 19:50:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 19:50:47,720 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-23 19:50:47,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:47,720 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 19:50:47,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:50:47,720 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 19:50:47,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 19:50:47,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:47,721 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-23 19:50:47,721 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:47,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:47,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-23 19:50:47,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:47,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:47,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:47,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:47,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:48,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:48,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:48,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:48,321 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 19:50:48,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:48,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:48,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:48,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-23 19:50:48,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:50:48,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:50:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:50:48,845 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-23 19:50:48,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:48,951 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 19:50:48,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:50:48,951 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-23 19:50:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:48,952 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:50:48,952 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 19:50:48,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:50:48,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 19:50:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 19:50:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 19:50:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 19:50:48,957 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-23 19:50:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:48,957 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 19:50:48,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:50:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 19:50:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 19:50:48,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:48,958 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-23 19:50:48,958 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:48,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:48,959 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-23 19:50:48,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:48,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:48,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:48,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:48,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:49,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:49,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:49,441 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:49,477 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:49,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:49,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:50,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:50,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-23 19:50:50,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:50:50,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:50:50,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:50:50,560 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-23 19:50:50,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:50,784 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 19:50:50,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:50:50,784 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-23 19:50:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:50,785 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:50:50,785 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 19:50:50,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:50:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 19:50:50,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 19:50:50,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 19:50:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 19:50:50,790 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-23 19:50:50,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:50,791 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 19:50:50,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:50:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 19:50:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 19:50:50,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:50,792 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-23 19:50:50,792 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:50,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:50,792 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-23 19:50:50,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:50,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:50,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:50,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:50,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:51,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:51,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:51,284 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:51,312 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 19:50:51,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:51,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:51,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:51,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-23 19:50:51,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:50:51,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:50:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:50:51,904 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-23 19:50:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:52,069 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 19:50:52,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:50:52,069 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-23 19:50:52,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:52,070 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:50:52,070 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 19:50:52,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:50:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 19:50:52,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 19:50:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:50:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 19:50:52,074 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-23 19:50:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:52,074 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 19:50:52,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:50:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 19:50:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 19:50:52,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:52,075 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-23 19:50:52,075 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:52,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-23 19:50:52,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:52,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:52,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:52,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:52,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:53,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:53,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:53,299 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:53,342 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:50:53,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:53,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:53,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:53,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-23 19:50:53,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:50:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:50:53,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:50:53,950 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-23 19:50:54,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:54,064 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 19:50:54,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:50:54,064 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-23 19:50:54,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:54,065 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:50:54,065 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 19:50:54,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:50:54,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 19:50:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 19:50:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 19:50:54,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 19:50:54,070 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-23 19:50:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:54,070 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 19:50:54,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:50:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 19:50:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 19:50:54,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:54,071 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-23 19:50:54,072 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:54,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:54,072 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-23 19:50:54,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:54,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:54,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:54,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:54,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:54,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:54,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:54,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:54,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:55,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:55,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-23 19:50:55,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:50:55,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:50:55,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:50:55,330 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-23 19:50:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:55,485 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 19:50:55,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:50:55,485 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-23 19:50:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:55,486 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:50:55,486 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:50:55,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:50:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:50:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 19:50:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 19:50:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 19:50:55,491 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-23 19:50:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:55,491 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 19:50:55,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:50:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 19:50:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 19:50:55,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:55,492 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-23 19:50:55,492 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:55,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-23 19:50:55,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:55,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:55,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:55,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:55,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:56,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:56,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:56,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:56,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:56,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:56,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:57,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:57,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-23 19:50:57,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:50:57,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:50:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:50:57,046 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-23 19:50:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:57,176 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 19:50:57,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:50:57,176 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-23 19:50:57,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:57,177 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:50:57,177 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 19:50:57,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:50:57,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 19:50:57,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 19:50:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:50:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 19:50:57,183 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-23 19:50:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:57,183 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 19:50:57,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:50:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 19:50:57,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 19:50:57,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:57,184 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-23 19:50:57,184 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:57,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:57,185 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-23 19:50:57,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:57,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:57,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:57,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:57,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:58,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:58,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:58,129 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 19:50:58,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:58,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:58,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-23 19:50:58,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:50:58,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:50:58,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:50:58,883 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-23 19:50:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:59,084 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 19:50:59,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:50:59,084 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-23 19:50:59,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:59,085 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:50:59,085 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 19:50:59,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:50:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 19:50:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 19:50:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 19:50:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 19:50:59,090 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-23 19:50:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:59,090 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 19:50:59,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:50:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 19:50:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 19:50:59,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:59,091 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-23 19:50:59,091 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:59,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:59,092 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-23 19:50:59,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:59,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:59,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:59,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:59,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:59,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:59,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:50:59,868 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:59,887 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:59,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:59,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:00,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:00,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-23 19:51:00,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:51:00,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:51:00,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:51:00,651 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-23 19:51:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:00,823 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 19:51:00,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:51:00,823 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-23 19:51:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:00,824 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:51:00,824 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 19:51:00,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:51:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 19:51:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 19:51:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 19:51:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 19:51:00,829 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-23 19:51:00,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:00,830 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 19:51:00,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:51:00,830 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 19:51:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 19:51:00,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:00,831 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-23 19:51:00,831 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:00,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:00,831 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-23 19:51:00,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:00,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:00,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:00,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:01,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:01,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:01,754 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:01,789 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 19:51:01,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:01,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:02,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:02,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-23 19:51:02,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:51:02,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:51:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:51:02,739 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-23 19:51:03,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:03,084 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 19:51:03,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:51:03,084 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-23 19:51:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:03,085 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:51:03,085 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 19:51:03,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:51:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 19:51:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 19:51:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 19:51:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 19:51:03,090 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-23 19:51:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:03,090 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 19:51:03,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:51:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 19:51:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 19:51:03,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:03,090 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-23 19:51:03,091 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:03,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:03,091 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-23 19:51:03,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:03,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:03,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:03,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:03,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:03,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:03,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:03,933 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:03,967 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:51:03,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:03,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:04,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:04,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-23 19:51:04,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:51:04,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:51:04,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:51:04,868 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-23 19:51:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:05,044 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 19:51:05,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:51:05,045 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-23 19:51:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:05,046 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:51:05,046 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 19:51:05,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:51:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 19:51:05,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 19:51:05,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 19:51:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 19:51:05,050 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-23 19:51:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:05,050 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 19:51:05,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:51:05,051 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 19:51:05,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 19:51:05,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:05,051 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-23 19:51:05,051 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:05,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:05,052 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-23 19:51:05,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:05,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:05,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:05,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:05,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:06,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:06,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:06,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:06,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:07,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:07,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-23 19:51:07,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:51:07,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:51:07,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:51:07,296 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-23 19:51:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:07,446 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 19:51:07,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:51:07,446 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-23 19:51:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:07,447 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:51:07,447 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 19:51:07,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:51:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 19:51:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 19:51:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 19:51:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 19:51:07,453 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-23 19:51:07,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:07,453 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 19:51:07,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:51:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 19:51:07,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 19:51:07,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:07,454 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-23 19:51:07,454 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:07,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:07,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-23 19:51:07,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:07,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:07,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:07,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:07,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:08,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:08,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:08,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:08,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:08,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:08,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:09,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:09,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-23 19:51:09,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:51:09,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:51:09,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:51:09,466 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-23 19:51:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:09,637 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 19:51:09,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:51:09,638 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-23 19:51:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:09,639 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:51:09,639 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 19:51:09,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:51:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 19:51:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 19:51:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 19:51:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 19:51:09,645 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-23 19:51:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:09,645 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 19:51:09,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:51:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 19:51:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 19:51:09,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:09,646 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-23 19:51:09,646 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:09,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:09,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-23 19:51:09,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:09,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:09,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:09,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:09,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:10,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:10,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:10,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:10,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 19:51:10,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:10,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:11,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:11,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-23 19:51:11,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:51:11,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:51:11,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:51:11,559 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-23 19:51:11,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:11,734 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 19:51:11,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:51:11,734 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-23 19:51:11,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:11,735 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:51:11,735 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 19:51:11,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:51:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 19:51:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 19:51:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 19:51:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 19:51:11,739 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-23 19:51:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:11,740 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 19:51:11,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:51:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 19:51:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 19:51:11,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:11,741 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-23 19:51:11,741 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:11,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-23 19:51:11,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:11,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:11,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:11,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:11,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:12,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:12,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:12,730 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:12,752 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:12,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:12,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:14,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:14,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-23 19:51:14,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:51:14,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:51:14,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:51:14,082 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-23 19:51:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:14,243 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 19:51:14,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:51:14,244 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-23 19:51:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:14,245 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:51:14,245 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 19:51:14,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:51:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 19:51:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 19:51:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 19:51:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-23 19:51:14,251 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-23 19:51:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:14,251 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-23 19:51:14,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:51:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-23 19:51:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 19:51:14,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:14,252 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-23 19:51:14,252 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:14,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:14,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-23 19:51:14,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:14,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:14,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:14,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:14,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:15,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:15,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:15,215 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:15,254 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 19:51:15,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:15,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:16,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:16,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-23 19:51:16,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:51:16,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:51:16,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:51:16,390 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-23 19:51:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:16,569 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 19:51:16,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:51:16,569 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-23 19:51:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:16,570 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:51:16,571 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 19:51:16,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:51:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 19:51:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 19:51:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 19:51:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-23 19:51:16,575 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-23 19:51:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:16,576 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-23 19:51:16,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:51:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-23 19:51:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 19:51:16,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:16,577 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-23 19:51:16,577 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:16,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:16,577 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-23 19:51:16,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:16,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:16,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:16,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:16,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:17,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:17,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:17,563 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:17,604 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:51:17,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:17,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:19,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:19,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-23 19:51:19,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:51:19,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:51:19,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:51:19,073 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-23 19:51:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:19,274 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 19:51:19,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:51:19,274 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-23 19:51:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:19,275 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:51:19,276 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 19:51:19,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:51:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 19:51:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 19:51:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 19:51:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-23 19:51:19,281 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-23 19:51:19,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:19,281 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-23 19:51:19,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:51:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-23 19:51:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 19:51:19,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:19,282 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-23 19:51:19,283 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:19,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-23 19:51:19,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:19,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:19,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:19,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:19,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:21,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:21,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:21,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:21,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:22,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:22,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-23 19:51:22,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:51:22,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:51:22,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:51:22,429 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-23 19:51:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:22,596 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 19:51:22,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:51:22,596 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-23 19:51:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:22,597 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:51:22,597 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 19:51:22,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:51:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 19:51:22,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 19:51:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 19:51:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-23 19:51:22,602 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-23 19:51:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:22,602 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-23 19:51:22,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:51:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-23 19:51:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 19:51:22,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:22,603 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-23 19:51:22,603 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:22,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:22,604 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-23 19:51:22,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:22,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:22,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:22,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:22,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:23,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:23,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:23,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:23,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:23,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:23,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:25,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:25,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-23 19:51:25,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:51:25,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:51:25,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:51:25,081 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-23 19:51:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:25,261 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 19:51:25,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:51:25,261 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-23 19:51:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:25,262 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:51:25,262 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 19:51:25,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:51:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 19:51:25,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 19:51:25,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 19:51:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-23 19:51:25,268 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-23 19:51:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:25,269 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-23 19:51:25,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:51:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-23 19:51:25,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 19:51:25,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:25,270 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-23 19:51:25,270 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:25,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:25,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-23 19:51:25,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:25,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:25,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:25,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:25,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:26,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:26,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:26,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:26,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 19:51:26,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:26,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:27,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:27,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-23 19:51:27,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:51:27,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:51:27,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:51:27,849 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-23 19:51:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:28,045 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 19:51:28,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:51:28,045 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-23 19:51:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:28,047 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:51:28,047 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 19:51:28,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:51:28,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 19:51:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 19:51:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 19:51:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-23 19:51:28,052 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-23 19:51:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:28,053 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-23 19:51:28,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:51:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-23 19:51:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 19:51:28,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:28,054 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-23 19:51:28,054 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:28,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:28,054 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-23 19:51:28,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:28,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:28,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:28,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:28,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:29,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:29,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:29,439 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:29,466 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:29,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:29,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:30,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:30,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-23 19:51:30,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:51:30,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:51:30,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:51:30,793 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-23 19:51:30,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:30,999 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 19:51:30,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:51:30,999 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-23 19:51:31,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:31,000 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:51:31,001 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 19:51:31,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:51:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 19:51:31,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 19:51:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 19:51:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-23 19:51:31,004 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-23 19:51:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:31,004 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-23 19:51:31,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:51:31,004 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-23 19:51:31,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 19:51:31,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:31,005 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-23 19:51:31,005 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:31,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:31,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-23 19:51:31,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:31,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:31,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:31,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:31,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:32,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:32,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:32,514 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:32,561 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 19:51:32,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:32,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:34,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:34,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-23 19:51:34,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:51:34,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:51:34,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:51:34,318 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-23 19:51:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:34,516 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 19:51:34,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:51:34,516 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-23 19:51:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:34,517 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:51:34,517 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 19:51:34,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:51:34,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 19:51:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 19:51:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 19:51:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-23 19:51:34,523 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-23 19:51:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:34,523 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-23 19:51:34,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:51:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-23 19:51:34,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 19:51:34,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:34,524 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-23 19:51:34,524 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:34,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:34,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-23 19:51:34,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:34,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:34,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:34,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:34,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:35,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:35,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:35,694 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:35,741 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:51:35,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:35,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:37,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:37,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-23 19:51:37,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 19:51:37,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 19:51:37,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:51:37,131 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-23 19:51:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:37,364 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 19:51:37,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:51:37,365 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-23 19:51:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:37,366 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:51:37,366 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 19:51:37,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:51:37,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 19:51:37,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 19:51:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 19:51:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-23 19:51:37,371 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-23 19:51:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:37,371 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-23 19:51:37,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 19:51:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-23 19:51:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 19:51:37,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:37,372 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-23 19:51:37,373 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:37,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-23 19:51:37,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:37,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:37,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:37,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:37,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:38,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:38,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:38,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:38,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:41,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:41,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-23 19:51:41,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 19:51:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 19:51:41,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:51:41,493 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-23 19:51:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:41,767 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 19:51:41,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:51:41,767 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-23 19:51:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:41,768 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:51:41,769 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 19:51:41,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:51:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 19:51:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 19:51:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 19:51:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-23 19:51:41,775 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-23 19:51:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:41,775 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-23 19:51:41,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 19:51:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-23 19:51:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 19:51:41,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:41,776 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-23 19:51:41,776 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:41,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-23 19:51:41,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:41,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:41,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:41,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:41,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:42,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:42,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:42,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:43,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:43,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:43,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:44,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:44,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-23 19:51:44,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 19:51:44,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 19:51:44,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:51:44,738 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-23 19:51:46,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:46,562 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 19:51:46,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:51:46,562 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-23 19:51:46,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:46,563 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:51:46,564 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 19:51:46,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:51:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 19:51:46,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 19:51:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 19:51:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-23 19:51:46,569 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-23 19:51:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:46,570 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-23 19:51:46,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 19:51:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-23 19:51:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 19:51:46,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:46,571 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-23 19:51:46,571 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:46,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:46,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-23 19:51:46,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:46,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:46,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:46,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:46,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:48,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:48,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:48,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:48,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 19:51:48,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:48,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:50,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:50,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-23 19:51:50,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 19:51:50,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 19:51:50,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:51:50,070 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-23 19:51:50,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:50,284 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 19:51:50,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:51:50,285 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-23 19:51:50,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:50,286 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:51:50,286 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 19:51:50,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:51:50,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 19:51:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 19:51:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 19:51:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-23 19:51:50,292 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-23 19:51:50,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:50,292 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-23 19:51:50,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 19:51:50,292 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-23 19:51:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 19:51:50,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:50,293 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-23 19:51:50,293 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:50,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-23 19:51:50,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:50,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:50,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:50,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:50,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:51,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:51,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:51,543 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:51,587 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:51,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:51,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:53,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:53,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-23 19:51:53,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 19:51:53,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 19:51:53,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:51:53,600 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-23 19:51:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:53,801 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 19:51:53,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:51:53,802 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-23 19:51:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:53,803 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:51:53,803 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 19:51:53,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:51:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 19:51:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 19:51:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 19:51:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-23 19:51:53,808 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-23 19:51:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:53,808 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-23 19:51:53,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 19:51:53,808 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-23 19:51:53,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 19:51:53,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:53,809 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-23 19:51:53,809 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:53,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:53,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-23 19:51:53,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:53,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:53,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:53,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:53,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:55,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:55,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:55,268 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:55,391 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-23 19:51:55,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:55,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:57,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:57,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-23 19:51:57,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 19:51:57,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 19:51:57,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:51:57,211 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-23 19:51:57,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:57,421 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 19:51:57,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:51:57,421 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-23 19:51:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:57,422 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:51:57,422 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 19:51:57,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:51:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 19:51:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 19:51:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 19:51:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-23 19:51:57,428 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-23 19:51:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:57,428 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-23 19:51:57,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 19:51:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-23 19:51:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 19:51:57,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:57,429 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-23 19:51:57,429 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:57,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:57,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-23 19:51:57,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:57,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:57,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:57,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:57,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:59,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:59,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:59,351 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:59,405 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 19:51:59,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:59,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:01,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:01,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-23 19:52:01,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-23 19:52:01,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-23 19:52:01,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:52:01,212 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-23 19:52:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:01,461 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 19:52:01,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:52:01,461 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-23 19:52:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:01,463 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:52:01,463 INFO L226 Difference]: Without dead ends: 114 [2018-09-23 19:52:01,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:52:01,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-23 19:52:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-23 19:52:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 19:52:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-23 19:52:01,469 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-23 19:52:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:01,470 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-23 19:52:01,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-23 19:52:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-23 19:52:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 19:52:01,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:01,471 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-23 19:52:01,471 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:01,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:01,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-23 19:52:01,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:01,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:01,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:01,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:01,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:02,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:02,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:02,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:02,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:04,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:04,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-23 19:52:04,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-23 19:52:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-23 19:52:04,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:52:04,884 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-23 19:52:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:05,261 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-23 19:52:05,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:52:05,262 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-23 19:52:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:05,263 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:52:05,263 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 19:52:05,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:52:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 19:52:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-23 19:52:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 19:52:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-23 19:52:05,269 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-23 19:52:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:05,270 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-23 19:52:05,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-23 19:52:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-23 19:52:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-23 19:52:05,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:05,282 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-23 19:52:05,283 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:05,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:05,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-23 19:52:05,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:05,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:05,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:05,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:05,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:06,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:06,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:06,829 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:06,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:06,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:06,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:08,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:08,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-23 19:52:08,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-23 19:52:08,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-23 19:52:08,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 19:52:08,635 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-23 19:52:08,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:08,934 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-23 19:52:08,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:52:08,935 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-23 19:52:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:08,936 INFO L225 Difference]: With dead ends: 119 [2018-09-23 19:52:08,936 INFO L226 Difference]: Without dead ends: 118 [2018-09-23 19:52:08,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 19:52:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-23 19:52:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-23 19:52:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-23 19:52:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-23 19:52:08,940 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-23 19:52:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:08,940 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-23 19:52:08,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-23 19:52:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-23 19:52:08,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-23 19:52:08,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:08,940 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-23 19:52:08,941 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:08,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-23 19:52:08,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:08,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:08,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:08,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:08,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:10,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:10,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:10,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:10,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-23 19:52:10,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:10,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:12,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:12,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-23 19:52:12,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-23 19:52:12,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-23 19:52:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 19:52:12,637 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-23 19:52:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:12,880 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-23 19:52:12,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:52:12,881 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-23 19:52:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:12,882 INFO L225 Difference]: With dead ends: 121 [2018-09-23 19:52:12,882 INFO L226 Difference]: Without dead ends: 120 [2018-09-23 19:52:12,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 19:52:12,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-23 19:52:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-23 19:52:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-23 19:52:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-23 19:52:12,888 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-23 19:52:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:12,888 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-23 19:52:12,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-23 19:52:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-23 19:52:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-23 19:52:12,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:12,889 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-23 19:52:12,890 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:12,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:12,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-23 19:52:12,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:12,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:12,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:12,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:12,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:15,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:15,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:15,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:15,148 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:15,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:15,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:17,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:17,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-23 19:52:17,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-23 19:52:17,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-23 19:52:17,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 19:52:17,391 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-23 19:52:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:17,667 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-23 19:52:17,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:52:17,668 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-23 19:52:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:17,668 INFO L225 Difference]: With dead ends: 123 [2018-09-23 19:52:17,669 INFO L226 Difference]: Without dead ends: 122 [2018-09-23 19:52:17,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 19:52:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-23 19:52:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-23 19:52:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-23 19:52:17,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-23 19:52:17,674 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-23 19:52:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:17,674 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-23 19:52:17,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-23 19:52:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-23 19:52:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-23 19:52:17,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:17,675 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-23 19:52:17,675 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:17,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:17,676 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-23 19:52:17,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:17,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:17,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:17,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:17,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:19,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:19,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:19,878 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:19,953 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-23 19:52:19,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:19,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:22,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:22,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-23 19:52:22,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-23 19:52:22,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-23 19:52:22,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 19:52:22,197 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-23 19:52:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:22,447 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-23 19:52:22,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:52:22,448 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-23 19:52:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:22,449 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:52:22,449 INFO L226 Difference]: Without dead ends: 124 [2018-09-23 19:52:22,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 19:52:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-23 19:52:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-23 19:52:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-23 19:52:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-23 19:52:22,453 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-23 19:52:22,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:22,454 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-23 19:52:22,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-23 19:52:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-23 19:52:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-23 19:52:22,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:22,454 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-23 19:52:22,454 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:22,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:22,455 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-23 19:52:22,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:22,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:22,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:22,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:22,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:24,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:24,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:24,271 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:24,332 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-23 19:52:24,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:24,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:26,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:26,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-23 19:52:26,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-23 19:52:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-23 19:52:26,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 19:52:26,685 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-23 19:52:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:26,933 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-23 19:52:26,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:52:26,934 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-23 19:52:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:26,935 INFO L225 Difference]: With dead ends: 127 [2018-09-23 19:52:26,935 INFO L226 Difference]: Without dead ends: 126 [2018-09-23 19:52:26,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 19:52:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-23 19:52:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-23 19:52:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-23 19:52:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-23 19:52:26,941 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-23 19:52:26,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:26,941 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-23 19:52:26,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-23 19:52:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-23 19:52:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-23 19:52:26,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:26,942 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-23 19:52:26,943 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:26,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:26,943 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-23 19:52:26,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:26,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:26,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:26,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:26,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:28,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:28,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:28,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:28,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:30,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:30,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-23 19:52:31,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-23 19:52:31,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-23 19:52:31,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 19:52:31,001 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-23 19:52:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:31,288 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-23 19:52:31,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:52:31,288 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-23 19:52:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:31,289 INFO L225 Difference]: With dead ends: 129 [2018-09-23 19:52:31,289 INFO L226 Difference]: Without dead ends: 128 [2018-09-23 19:52:31,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 19:52:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-23 19:52:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-23 19:52:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-23 19:52:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-23 19:52:31,294 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-23 19:52:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:31,295 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-23 19:52:31,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-23 19:52:31,295 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-23 19:52:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-23 19:52:31,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:31,295 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-23 19:52:31,295 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:31,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:31,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-23 19:52:31,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:31,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:31,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:31,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:31,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:34,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:34,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:34,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:34,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:34,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:34,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:36,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:36,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-23 19:52:36,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-23 19:52:36,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-23 19:52:36,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 19:52:36,724 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-23 19:52:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:36,959 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-23 19:52:36,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:52:36,960 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-23 19:52:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:36,961 INFO L225 Difference]: With dead ends: 131 [2018-09-23 19:52:36,961 INFO L226 Difference]: Without dead ends: 130 [2018-09-23 19:52:36,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 19:52:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-23 19:52:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-23 19:52:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-23 19:52:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-23 19:52:36,965 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-23 19:52:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:36,965 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-23 19:52:36,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-23 19:52:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-23 19:52:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-23 19:52:36,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:36,966 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-23 19:52:36,967 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:36,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:36,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-23 19:52:36,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:36,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:36,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:36,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:36,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:39,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:39,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:39,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:39,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-23 19:52:39,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:39,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:42,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:42,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-23 19:52:42,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-23 19:52:42,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-23 19:52:42,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 19:52:42,089 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-23 19:52:42,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:42,389 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-23 19:52:42,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:52:42,390 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-23 19:52:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:42,391 INFO L225 Difference]: With dead ends: 133 [2018-09-23 19:52:42,391 INFO L226 Difference]: Without dead ends: 132 [2018-09-23 19:52:42,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 19:52:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-23 19:52:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-23 19:52:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-23 19:52:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-23 19:52:42,396 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-23 19:52:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:42,396 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-23 19:52:42,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-23 19:52:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-23 19:52:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-23 19:52:42,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:42,397 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-23 19:52:42,398 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:42,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:42,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-23 19:52:42,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:42,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:42,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:42,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:42,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:44,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:44,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:44,269 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:44,306 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:44,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:44,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:46,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:46,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-23 19:52:46,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-23 19:52:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-23 19:52:46,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 19:52:46,893 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-23 19:52:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:47,152 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-23 19:52:47,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:52:47,153 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-23 19:52:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:47,154 INFO L225 Difference]: With dead ends: 135 [2018-09-23 19:52:47,154 INFO L226 Difference]: Without dead ends: 134 [2018-09-23 19:52:47,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 19:52:47,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-23 19:52:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-23 19:52:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-23 19:52:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-23 19:52:47,159 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-23 19:52:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:47,160 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-23 19:52:47,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-23 19:52:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-23 19:52:47,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-23 19:52:47,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:47,161 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-23 19:52:47,161 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:47,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:47,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-23 19:52:47,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:47,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:47,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:47,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:47,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:49,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:49,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:49,070 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:49,143 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-23 19:52:49,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:49,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:52,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:52,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-23 19:52:52,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-23 19:52:52,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-23 19:52:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 19:52:52,162 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-23 19:52:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:52,490 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-23 19:52:52,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:52:52,491 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-23 19:52:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:52,492 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:52:52,492 INFO L226 Difference]: Without dead ends: 136 [2018-09-23 19:52:52,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 19:52:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-23 19:52:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-23 19:52:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-23 19:52:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-23 19:52:52,498 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-23 19:52:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:52,499 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-23 19:52:52,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-23 19:52:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-23 19:52:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-23 19:52:52,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:52,500 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-23 19:52:52,500 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:52,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:52,500 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-23 19:52:52,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:52,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:52,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:52,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:52,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:54,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:54,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:54,402 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:54,477 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-23 19:52:54,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:54,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:57,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:57,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-23 19:52:57,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-23 19:52:57,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-23 19:52:57,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 19:52:57,318 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-23 19:52:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:57,625 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-23 19:52:57,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:52:57,625 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-23 19:52:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:57,626 INFO L225 Difference]: With dead ends: 139 [2018-09-23 19:52:57,626 INFO L226 Difference]: Without dead ends: 138 [2018-09-23 19:52:57,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 19:52:57,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-23 19:52:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-23 19:52:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-23 19:52:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-23 19:52:57,633 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-23 19:52:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:57,633 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-23 19:52:57,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-23 19:52:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-23 19:52:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-23 19:52:57,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:57,634 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-23 19:52:57,634 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:57,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:57,634 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-23 19:52:57,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:57,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:57,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:57,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:59,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:59,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:52:59,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:59,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:02,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:02,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-23 19:53:02,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-23 19:53:02,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-23 19:53:02,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 19:53:02,473 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-23 19:53:02,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:02,778 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-23 19:53:02,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:53:02,778 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-23 19:53:02,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:02,780 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:53:02,780 INFO L226 Difference]: Without dead ends: 140 [2018-09-23 19:53:02,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 19:53:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-23 19:53:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-23 19:53:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-23 19:53:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-23 19:53:02,786 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-23 19:53:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:02,786 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-23 19:53:02,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-23 19:53:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-23 19:53:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-23 19:53:02,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:02,787 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-23 19:53:02,787 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:02,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:02,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-23 19:53:02,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:02,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:02,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:02,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:02,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:04,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:04,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:04,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:04,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:04,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:04,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:07,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:07,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-23 19:53:07,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-23 19:53:07,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-23 19:53:07,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 19:53:07,713 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-23 19:53:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:08,016 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-23 19:53:08,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:53:08,017 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-23 19:53:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:08,018 INFO L225 Difference]: With dead ends: 143 [2018-09-23 19:53:08,018 INFO L226 Difference]: Without dead ends: 142 [2018-09-23 19:53:08,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 19:53:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-23 19:53:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-23 19:53:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-23 19:53:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-23 19:53:08,024 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-23 19:53:08,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:08,025 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-23 19:53:08,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-23 19:53:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-23 19:53:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-23 19:53:08,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:08,026 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-23 19:53:08,026 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:08,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:08,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-23 19:53:08,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:08,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:08,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:08,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:10,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:10,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:10,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:10,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 19:53:10,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:10,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:13,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:13,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-23 19:53:13,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-23 19:53:13,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-23 19:53:13,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 19:53:13,158 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-23 19:53:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:13,521 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-23 19:53:13,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:53:13,521 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-23 19:53:13,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:13,523 INFO L225 Difference]: With dead ends: 145 [2018-09-23 19:53:13,523 INFO L226 Difference]: Without dead ends: 144 [2018-09-23 19:53:13,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 19:53:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-23 19:53:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-23 19:53:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-23 19:53:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-23 19:53:13,528 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-23 19:53:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:13,529 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-23 19:53:13,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-23 19:53:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-23 19:53:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-23 19:53:13,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:13,529 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-23 19:53:13,530 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:13,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:13,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-23 19:53:13,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:13,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:13,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:13,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:13,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:15,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:15,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:15,720 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:15,759 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:15,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:15,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:19,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:19,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-23 19:53:19,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-23 19:53:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-23 19:53:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 19:53:19,033 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-23 19:53:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:19,446 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-23 19:53:19,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:53:19,447 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-23 19:53:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:19,448 INFO L225 Difference]: With dead ends: 147 [2018-09-23 19:53:19,448 INFO L226 Difference]: Without dead ends: 146 [2018-09-23 19:53:19,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 19:53:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-23 19:53:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-23 19:53:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-23 19:53:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-23 19:53:19,454 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-23 19:53:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:19,454 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-23 19:53:19,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-23 19:53:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-23 19:53:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-23 19:53:19,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:19,455 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-23 19:53:19,455 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:19,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:19,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-23 19:53:19,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:19,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:19,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:19,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:19,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:22,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:22,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:22,012 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:22,174 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-23 19:53:22,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:22,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:25,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:25,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-23 19:53:25,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-23 19:53:25,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-23 19:53:25,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-23 19:53:25,409 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-23 19:53:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:25,796 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-23 19:53:25,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:53:25,797 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-23 19:53:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:25,798 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:53:25,798 INFO L226 Difference]: Without dead ends: 148 [2018-09-23 19:53:25,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-23 19:53:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-23 19:53:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-23 19:53:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-23 19:53:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-23 19:53:25,804 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-23 19:53:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:25,804 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-23 19:53:25,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-23 19:53:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-23 19:53:25,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-23 19:53:25,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:25,805 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-23 19:53:25,805 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:25,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-23 19:53:25,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:25,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:25,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:25,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:25,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:28,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:28,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:28,385 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:28,474 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-23 19:53:28,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:28,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:31,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:31,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-23 19:53:31,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-23 19:53:31,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-23 19:53:31,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-23 19:53:31,687 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-23 19:53:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:32,275 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-23 19:53:32,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:53:32,276 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-23 19:53:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:32,277 INFO L225 Difference]: With dead ends: 151 [2018-09-23 19:53:32,277 INFO L226 Difference]: Without dead ends: 150 [2018-09-23 19:53:32,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-23 19:53:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-23 19:53:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-23 19:53:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-23 19:53:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-23 19:53:32,284 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-23 19:53:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:32,284 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-23 19:53:32,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-23 19:53:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-23 19:53:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-23 19:53:32,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:32,285 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-23 19:53:32,285 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:32,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:32,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-23 19:53:32,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:32,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:32,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:32,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:32,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:34,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:34,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:34,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:34,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:38,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:38,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-23 19:53:38,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-23 19:53:38,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-23 19:53:38,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-23 19:53:38,084 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-23 19:53:38,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:38,481 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-23 19:53:38,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:53:38,482 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-23 19:53:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:38,483 INFO L225 Difference]: With dead ends: 153 [2018-09-23 19:53:38,483 INFO L226 Difference]: Without dead ends: 152 [2018-09-23 19:53:38,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-23 19:53:38,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-23 19:53:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-23 19:53:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-23 19:53:38,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-23 19:53:38,490 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-23 19:53:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:38,490 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-23 19:53:38,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-23 19:53:38,490 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-23 19:53:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-23 19:53:38,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:38,491 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-23 19:53:38,491 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:38,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:38,492 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-23 19:53:38,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:38,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:38,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:38,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:38,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:40,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:40,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:40,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:40,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:40,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:40,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:44,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:44,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-23 19:53:44,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-23 19:53:44,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-23 19:53:44,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-23 19:53:44,361 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-23 19:53:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:44,765 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-23 19:53:44,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:53:44,765 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-23 19:53:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:44,766 INFO L225 Difference]: With dead ends: 155 [2018-09-23 19:53:44,766 INFO L226 Difference]: Without dead ends: 154 [2018-09-23 19:53:44,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-23 19:53:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-23 19:53:44,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-23 19:53:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-23 19:53:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-23 19:53:44,771 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-23 19:53:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:44,771 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-23 19:53:44,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-23 19:53:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-23 19:53:44,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-23 19:53:44,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:44,772 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-23 19:53:44,772 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:44,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:44,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-23 19:53:44,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:44,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:44,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:44,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:47,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:47,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:47,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:47,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-23 19:53:47,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:47,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:50,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:50,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-23 19:53:50,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-23 19:53:50,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-23 19:53:50,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-23 19:53:50,762 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-23 19:53:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:51,198 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-23 19:53:51,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:53:51,198 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-23 19:53:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:51,200 INFO L225 Difference]: With dead ends: 157 [2018-09-23 19:53:51,200 INFO L226 Difference]: Without dead ends: 156 [2018-09-23 19:53:51,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-23 19:53:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-23 19:53:51,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-23 19:53:51,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-23 19:53:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-23 19:53:51,205 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-23 19:53:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:51,205 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-23 19:53:51,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-23 19:53:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-23 19:53:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-23 19:53:51,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:51,206 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-23 19:53:51,206 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:51,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-23 19:53:51,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:51,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:51,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:51,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:51,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:53,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:53,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:53:54,005 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:54,051 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:54,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:54,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:57,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:57,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-23 19:53:57,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-23 19:53:57,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-23 19:53:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-23 19:53:57,453 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-23 19:53:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:57,784 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-23 19:53:57,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:53:57,785 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-23 19:53:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:57,786 INFO L225 Difference]: With dead ends: 159 [2018-09-23 19:53:57,786 INFO L226 Difference]: Without dead ends: 158 [2018-09-23 19:53:57,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-23 19:53:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-23 19:53:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-23 19:53:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-23 19:53:57,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-23 19:53:57,791 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-23 19:53:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:57,791 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-23 19:53:57,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-23 19:53:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-23 19:53:57,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-23 19:53:57,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:57,792 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-23 19:53:57,793 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:57,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:57,793 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-23 19:53:57,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:57,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:57,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:57,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:57,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:00,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:00,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:00,431 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:54:00,525 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-23 19:54:00,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:00,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:04,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:04,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-23 19:54:04,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-23 19:54:04,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-23 19:54:04,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-23 19:54:04,117 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-23 19:54:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:04,491 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-23 19:54:04,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:54:04,492 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-23 19:54:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:04,493 INFO L225 Difference]: With dead ends: 161 [2018-09-23 19:54:04,493 INFO L226 Difference]: Without dead ends: 160 [2018-09-23 19:54:04,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-23 19:54:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-23 19:54:04,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-23 19:54:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-23 19:54:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-23 19:54:04,499 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-23 19:54:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:04,500 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-23 19:54:04,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-23 19:54:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-23 19:54:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-23 19:54:04,501 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:04,501 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-23 19:54:04,501 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:04,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-23 19:54:04,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:04,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:04,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:04,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:04,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:07,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:07,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:07,461 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:54:07,569 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-23 19:54:07,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:07,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:10,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:10,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-23 19:54:10,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-23 19:54:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-23 19:54:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-23 19:54:10,907 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-23 19:54:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:11,314 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-23 19:54:11,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:54:11,314 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-23 19:54:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:11,315 INFO L225 Difference]: With dead ends: 163 [2018-09-23 19:54:11,316 INFO L226 Difference]: Without dead ends: 162 [2018-09-23 19:54:11,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-23 19:54:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-23 19:54:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-23 19:54:11,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-23 19:54:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-23 19:54:11,322 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-23 19:54:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:11,322 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-23 19:54:11,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-23 19:54:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-23 19:54:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-23 19:54:11,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:11,323 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-23 19:54:11,323 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:11,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:11,324 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-23 19:54:11,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:11,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:11,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:11,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:54:11,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:14,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:14,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:14,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:14,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:54:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:17,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:54:17,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-23 19:54:17,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-23 19:54:17,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-23 19:54:17,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-23 19:54:17,858 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-23 19:54:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:54:18,250 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-23 19:54:18,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:54:18,250 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-23 19:54:18,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:54:18,251 INFO L225 Difference]: With dead ends: 165 [2018-09-23 19:54:18,252 INFO L226 Difference]: Without dead ends: 164 [2018-09-23 19:54:18,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-23 19:54:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-23 19:54:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-23 19:54:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-23 19:54:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-23 19:54:18,257 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-23 19:54:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:54:18,257 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-23 19:54:18,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-23 19:54:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-23 19:54:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-23 19:54:18,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:54:18,258 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-23 19:54:18,259 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:54:18,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:54:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-23 19:54:18,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:54:18,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:54:18,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:18,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:54:18,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:54:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:54:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:54:21,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:54:21,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:21,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:54:21,054 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:54:21,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:54:21,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-23 19:54:22,518 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-23 19:54:22,719 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:54:22,719 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:54:22,725 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:54:22,725 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:54:22 BoogieIcfgContainer [2018-09-23 19:54:22,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:54:22,726 INFO L168 Benchmark]: Toolchain (without parser) took 239014.33 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -149.4 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 284.3 MB). Peak memory consumption was 134.9 MB. Max. memory is 7.1 GB. [2018-09-23 19:54:22,727 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:54:22,728 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:54:22,728 INFO L168 Benchmark]: Boogie Preprocessor took 30.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:54:22,729 INFO L168 Benchmark]: RCFGBuilder took 266.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:54:22,729 INFO L168 Benchmark]: TraceAbstraction took 238663.64 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -149.4 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 263.2 MB). Peak memory consumption was 113.8 MB. Max. memory is 7.1 GB. [2018-09-23 19:54:22,731 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 0.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 266.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 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 238663.64 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -149.4 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 263.2 MB). Peak memory consumption was 113.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 164 with TraceHistMax 81, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 131 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 238.5s OverallTime, 81 OverallIterations, 81 TraceHistogramMax, 18.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13221 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341280 ImplicationChecksByTransitivity, 202.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 80 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 207.2s InterpolantComputationTime, 13117 NumberOfCodeBlocks, 13117 NumberOfCodeBlocksAsserted, 1771 NumberOfCheckSat, 12958 ConstructedInterpolants, 0 QuantifiedInterpolants, 8346212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13272 ConjunctsInSsa, 3397 ConjunctsInUnsatCore, 159 InterpolantComputations, 1 PerfectInterpolantSequences, 0/341280 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/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-54-22-746.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-54-22-746.csv Completed graceful shutdown