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/LexIndexValue-Pointer-Reduced.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:13:25,038 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:13:25,040 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:13:25,053 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:13:25,054 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:13:25,055 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:13:25,056 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:13:25,058 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:13:25,059 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:13:25,060 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:13:25,061 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:13:25,087 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-28 10:13:25,114 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:13:25,115 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:13:25,116 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:13:25,116 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:13:25,117 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:13:25,117 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:13:25,117 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:13:25,117 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:13:25,117 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:13:25,118 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:13:25,118 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:13:25,120 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:13:25,121 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:13:25,121 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:13:25,121 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:13:25,121 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:13:25,121 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:13:25,122 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:13:25,122 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:13:25,122 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:13:25,122 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:13:25,122 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:13:25,123 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:13:25,123 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:13:25,123 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:13:25,123 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:13:25,125 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:13:25,126 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:13:25,126 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:13:25,126 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:13:25,186 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:13:25,202 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:13:25,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:13:25,210 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:13:25,211 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:13:25,212 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl [2018-09-28 10:13:25,212 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl' [2018-09-28 10:13:25,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:13:25,273 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:13:25,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:13:25,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:13:25,275 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:13:25,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:25" (1/1) ... [2018-09-28 10:13:25,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:25" (1/1) ... [2018-09-28 10:13:25,318 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:13:25,319 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:13:25,319 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:13:25,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:13:25,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:13:25,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:13:25,323 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:13:25,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:25" (1/1) ... [2018-09-28 10:13:25,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:25" (1/1) ... [2018-09-28 10:13:25,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:25" (1/1) ... [2018-09-28 10:13:25,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:25" (1/1) ... [2018-09-28 10:13:25,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:25" (1/1) ... [2018-09-28 10:13:25,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:25" (1/1) ... [2018-09-28 10:13:25,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:25" (1/1) ... [2018-09-28 10:13:25,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:13:25,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:13:25,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:13:25,351 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:13:25,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:13:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-28 10:13:25,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-28 10:13:25,603 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:13:25,604 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:13:25 BoogieIcfgContainer [2018-09-28 10:13:25,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:13:25,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:13:25,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:13:25,609 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:13:25,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:13:25" (1/2) ... [2018-09-28 10:13:25,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702e99a7 and model type LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:13:25, skipping insertion in model container [2018-09-28 10:13:25,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:13:25" (2/2) ... [2018-09-28 10:13:25,612 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-Reduced.bpl [2018-09-28 10:13:25,623 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:13:25,632 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:13:25,687 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:13:25,688 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:13:25,688 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:13:25,688 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:13:25,689 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:13:25,689 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:13:25,689 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:13:25,689 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:13:25,689 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:13:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-28 10:13:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:13:25,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:25,714 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:13:25,715 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:25,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-28 10:13:25,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:25,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:25,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:25,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:25,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:25,907 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:13:25,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-28 10:13:25,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:13:25,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:13:25,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:13:25,926 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-28 10:13:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:25,984 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:13:25,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:13:25,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 10:13:25,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:26,000 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:13:26,000 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:13:26,004 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 [2018-09-28 10:13:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:13:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:13:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:13:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:13:26,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-28 10:13:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:26,075 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:13:26,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:13:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:13:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:13:26,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:26,076 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-28 10:13:26,076 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:26,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:26,077 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-28 10:13:26,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:26,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:26,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:26,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:26,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:26,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:26,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:26,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:26,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:26,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:26,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-28 10:13:26,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:13:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:13:26,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:13:26,416 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-28 10:13:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:26,457 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:13:26,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:13:26,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-28 10:13:26,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:26,460 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:13:26,461 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:13:26,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:13:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:13:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:13:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:13:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:13:26,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-28 10:13:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:26,469 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:13:26,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:13:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:13:26,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:13:26,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:26,471 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-28 10:13:26,471 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:26,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:26,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-28 10:13:26,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:26,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:26,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:26,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:26,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:26,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:26,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:26,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:26,601 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:26,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:26,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:26,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:26,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-28 10:13:26,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:13:26,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:13:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:13:26,773 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-28 10:13:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:27,015 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:13:27,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:13:27,016 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-28 10:13:27,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:27,017 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:13:27,017 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:13:27,018 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 [2018-09-28 10:13:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:13:27,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:13:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:13:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:13:27,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-28 10:13:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:27,022 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:13:27,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:13:27,022 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:13:27,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:13:27,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:27,023 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-28 10:13:27,025 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:27,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-28 10:13:27,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:27,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:27,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:27,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:27,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:27,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:27,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:27,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:27,192 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:13:27,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:27,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:27,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:27,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-28 10:13:27,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:13:27,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:13:27,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:13:27,308 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-28 10:13:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:27,358 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:13:27,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:13:27,359 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-28 10:13:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:27,360 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:13:27,360 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:13:27,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:13:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:13:27,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:13:27,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:13:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:13:27,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-28 10:13:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:27,365 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:13:27,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:13:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:13:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:13:27,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:27,366 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-28 10:13:27,366 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:27,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:27,367 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-28 10:13:27,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:27,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:27,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:27,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:27,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:27,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:27,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:27,536 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:27,544 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:27,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:27,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:27,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:27,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-28 10:13:27,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:13:27,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:13:27,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:13:27,698 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-28 10:13:27,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:27,826 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:13:27,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:13:27,826 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-28 10:13:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:27,827 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:13:27,827 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:13:27,828 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 [2018-09-28 10:13:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:13:27,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:13:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:13:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:13:27,832 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-28 10:13:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:27,832 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:13:27,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:13:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:13:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:13:27,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:27,833 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-28 10:13:27,834 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:27,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:27,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-28 10:13:27,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:27,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:27,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:27,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:27,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:28,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:28,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:28,028 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:28,076 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:13:28,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:28,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:28,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:28,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-28 10:13:28,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:13:28,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:13:28,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:13:28,501 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-28 10:13:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:28,587 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:13:28,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:13:28,588 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-28 10:13:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:28,588 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:13:28,589 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:13:28,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:13:28,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:13:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:13:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:13:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:13:28,593 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-28 10:13:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:28,594 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:13:28,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:13:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:13:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:13:28,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:28,595 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-28 10:13:28,595 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:28,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:28,596 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-28 10:13:28,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:28,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:28,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:28,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:28,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:28,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:28,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:28,727 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:28,735 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:13:28,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:28,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:28,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:28,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-28 10:13:28,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:13:28,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:13:28,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:13:28,905 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-28 10:13:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:28,961 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:13:28,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:13:28,961 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-28 10:13:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:28,963 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:13:28,963 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:13:28,964 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 [2018-09-28 10:13:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:13:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:13:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:13:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:13:28,969 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-28 10:13:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:28,969 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:13:28,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:13:28,970 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:13:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:13:28,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:28,970 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-28 10:13:28,971 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:28,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:28,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-28 10:13:28,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:28,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:28,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:28,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:28,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:29,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:29,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:29,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:29,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:29,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:29,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-28 10:13:29,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:13:29,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:13:29,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:13:29,386 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-28 10:13:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:29,451 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:13:29,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:13:29,452 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-28 10:13:29,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:29,453 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:13:29,453 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:13:29,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:13:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:13:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:13:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:13:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:13:29,458 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-28 10:13:29,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:29,458 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:13:29,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:13:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:13:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:13:29,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:29,460 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-28 10:13:29,460 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:29,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-28 10:13:29,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:29,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:29,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:29,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:29,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:29,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:29,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:29,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:29,718 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:29,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:29,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:29,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:29,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-28 10:13:29,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:13:29,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:13:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:13:29,913 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-28 10:13:29,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:29,983 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:13:29,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:13:29,984 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-28 10:13:29,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:29,985 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:13:29,985 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:13:29,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:13:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:13:29,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:13:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:13:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:13:29,989 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-28 10:13:29,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:29,989 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:13:29,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:13:29,990 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:13:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:13:29,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:29,991 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-28 10:13:29,991 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:29,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:29,991 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-28 10:13:29,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:29,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:29,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:29,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:29,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:30,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:30,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:30,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:30,263 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-28 10:13:30,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:30,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:30,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:30,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-28 10:13:30,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:13:30,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:13:30,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:13:30,507 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-28 10:13:30,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:30,786 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:13:30,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:13:30,787 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-28 10:13:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:30,788 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:13:30,788 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:13:30,789 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 [2018-09-28 10:13:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:13:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:13:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:13:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:13:30,799 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-28 10:13:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:30,800 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:13:30,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:13:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:13:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:13:30,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:30,802 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-28 10:13:30,803 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:30,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:30,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-28 10:13:30,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:30,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:30,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:30,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:30,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:31,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:31,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:31,025 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:31,034 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:31,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:31,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:31,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:31,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-28 10:13:31,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:13:31,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:13:31,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:13:31,272 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-28 10:13:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:31,334 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:13:31,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:13:31,335 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-28 10:13:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:31,336 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:13:31,336 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:13:31,337 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 [2018-09-28 10:13:31,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:13:31,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:13:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:13:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:13:31,342 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-28 10:13:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:31,342 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:13:31,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:13:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:13:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:13:31,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:31,343 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-28 10:13:31,344 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:31,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:31,344 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-28 10:13:31,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:31,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:31,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:31,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:31,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:31,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:31,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:31,525 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:31,544 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-28 10:13:31,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:31,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:32,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:32,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-28 10:13:32,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:13:32,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:13:32,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:13:32,074 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-28 10:13:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:32,170 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:13:32,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:13:32,171 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-28 10:13:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:32,172 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:13:32,172 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:13:32,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:13:32,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:13:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:13:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:13:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:13:32,178 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-28 10:13:32,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:32,178 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:13:32,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:13:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:13:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:13:32,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:32,179 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-28 10:13:32,179 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:32,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:32,180 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-28 10:13:32,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:32,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:32,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:32,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:32,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:32,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:32,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:32,468 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:32,505 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:13:32,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:32,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:32,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:32,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-28 10:13:32,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:13:32,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:13:32,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:13:32,793 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-28 10:13:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:32,870 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:13:32,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:13:32,871 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-28 10:13:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:32,872 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:13:32,872 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:13:32,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:13:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:13:32,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:13:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:13:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:13:32,878 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-28 10:13:32,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:32,879 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:13:32,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:13:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:13:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:13:32,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:32,880 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-28 10:13:32,880 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:32,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-28 10:13:32,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:32,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:32,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:32,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:32,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:33,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:33,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:33,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:33,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:33,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:33,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-28 10:13:33,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:13:33,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:13:33,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:13:33,490 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-28 10:13:33,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:33,573 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:13:33,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:13:33,573 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-28 10:13:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:33,574 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:13:33,574 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:13:33,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:13:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:13:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:13:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:13:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:13:33,580 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-28 10:13:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:33,580 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:13:33,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:13:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:13:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:13:33,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:33,581 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-28 10:13:33,581 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:33,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-28 10:13:33,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:33,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:33,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:33,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:33,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:33,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:33,890 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 [2018-09-28 10:13:33,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:33,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:33,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:33,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:34,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:34,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-28 10:13:34,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:13:34,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:13:34,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:13:34,237 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-28 10:13:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:34,347 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:13:34,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:13:34,347 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-28 10:13:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:34,348 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:13:34,349 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:13:34,350 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 [2018-09-28 10:13:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:13:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:13:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:13:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:13:34,355 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-28 10:13:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:34,355 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:13:34,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:13:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:13:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:13:34,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:34,356 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-28 10:13:34,356 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:34,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-28 10:13:34,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:34,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:34,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:34,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:34,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:34,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:34,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:34,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:34,791 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-28 10:13:34,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:34,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:35,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:35,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-28 10:13:35,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:13:35,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:13:35,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:13:35,293 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-28 10:13:35,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:35,436 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:13:35,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:13:35,436 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-28 10:13:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:35,437 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:13:35,437 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:13:35,438 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 [2018-09-28 10:13:35,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:13:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:13:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:13:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:13:35,443 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-28 10:13:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:35,443 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:13:35,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:13:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:13:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:13:35,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:35,444 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-28 10:13:35,444 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:35,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:35,444 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-28 10:13:35,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:35,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:35,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:35,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:35,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:35,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:35,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:35,655 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:35,665 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:35,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:35,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:35,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:35,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-28 10:13:35,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:13:35,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:13:35,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:13:35,974 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-28 10:13:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:36,051 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:13:36,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:13:36,052 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-28 10:13:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:36,052 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:13:36,053 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:13:36,054 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 [2018-09-28 10:13:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:13:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:13:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:13:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:13:36,059 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-28 10:13:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:36,059 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:13:36,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:13:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:13:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:13:36,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:36,060 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-28 10:13:36,060 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:36,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:36,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-28 10:13:36,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:36,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:36,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:36,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:36,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:36,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:36,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:36,605 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:36,623 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-28 10:13:36,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:36,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:37,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:37,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-28 10:13:37,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:13:37,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:13:37,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:13:37,123 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-28 10:13:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:37,394 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:13:37,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:13:37,395 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-28 10:13:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:37,396 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:13:37,396 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:13:37,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:13:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:13:37,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:13:37,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:13:37,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:13:37,402 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-28 10:13:37,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:37,403 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:13:37,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:13:37,403 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:13:37,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:13:37,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:37,404 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-28 10:13:37,404 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:37,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:37,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-28 10:13:37,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:37,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:37,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:37,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:37,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:37,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:37,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:37,742 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:37,758 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:13:37,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:37,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:38,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:38,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-28 10:13:38,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:13:38,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:13:38,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:13:38,531 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-28 10:13:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:38,628 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:13:38,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:13:38,629 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-28 10:13:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:38,630 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:13:38,630 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:13:38,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:13:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:13:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:13:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:13:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:13:38,636 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-28 10:13:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:38,636 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:13:38,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:13:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:13:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:13:38,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:38,637 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-28 10:13:38,637 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:38,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:38,637 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-28 10:13:38,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:38,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:38,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:38,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:38,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:38,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:38,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:38,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:38,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:39,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:39,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-28 10:13:39,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:13:39,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:13:39,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:13:39,794 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-28 10:13:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:39,933 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:13:39,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:13:39,933 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-28 10:13:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:39,934 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:13:39,934 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:13:39,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:13:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:13:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:13:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:13:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:13:39,940 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-28 10:13:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:39,940 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:13:39,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:13:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:13:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:13:39,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:39,941 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-28 10:13:39,941 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:39,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-28 10:13:39,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:39,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:39,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:39,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:39,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:41,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:41,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:41,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:41,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:41,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:41,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:41,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:41,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-28 10:13:41,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:13:41,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:13:41,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:13:41,583 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-28 10:13:41,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:41,682 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:13:41,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:13:41,683 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-28 10:13:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:41,684 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:13:41,684 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:13:41,685 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 [2018-09-28 10:13:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:13:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:13:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:13:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:13:41,691 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-28 10:13:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:41,691 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:13:41,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:13:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:13:41,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:13:41,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:41,692 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-28 10:13:41,693 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:41,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:41,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-28 10:13:41,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:41,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:41,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:41,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:41,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:42,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:42,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:42,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:42,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-28 10:13:42,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:42,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:43,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:43,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-28 10:13:43,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:13:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:13:43,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:13:43,103 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-28 10:13:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:43,252 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:13:43,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:13:43,255 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-28 10:13:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:43,255 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:13:43,256 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:13:43,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:13:43,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:13:43,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:13:43,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:13:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:13:43,261 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-28 10:13:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:43,261 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:13:43,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:13:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:13:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:13:43,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:43,262 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-28 10:13:43,262 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:43,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:43,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-28 10:13:43,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:43,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:43,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:43,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:43,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:43,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:43,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:43,569 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:43,582 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:43,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:43,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:44,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:44,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-28 10:13:44,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:13:44,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:13:44,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:13:44,136 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-28 10:13:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:44,240 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:13:44,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:13:44,241 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-28 10:13:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:44,242 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:13:44,242 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:13:44,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:13:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:13:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:13:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:13:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:13:44,248 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-28 10:13:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:44,249 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:13:44,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:13:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:13:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:13:44,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:44,250 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-28 10:13:44,250 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:44,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:44,250 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-28 10:13:44,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:44,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:44,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:44,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:44,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:44,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:44,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:44,702 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:44,722 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-28 10:13:44,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:44,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:45,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:45,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-28 10:13:45,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:13:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:13:45,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:13:45,291 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-28 10:13:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:45,456 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:13:45,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:13:45,456 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-28 10:13:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:45,456 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:13:45,457 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:13:45,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:13:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:13:45,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:13:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:13:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:13:45,461 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-28 10:13:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:45,462 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:13:45,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:13:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:13:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:13:45,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:45,463 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-28 10:13:45,463 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:45,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-28 10:13:45,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:45,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:45,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:45,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:45,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:45,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:45,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:45,979 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:46,008 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:13:46,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:46,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:46,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:46,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-28 10:13:46,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:13:46,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:13:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:13:46,476 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-28 10:13:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:46,632 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:13:46,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:13:46,632 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-28 10:13:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:46,633 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:13:46,633 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:13:46,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:13:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:13:46,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:13:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:13:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-28 10:13:46,639 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-28 10:13:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:46,639 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-28 10:13:46,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:13:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-28 10:13:46,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:13:46,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:46,640 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-28 10:13:46,640 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:46,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-28 10:13:46,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:46,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:46,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:46,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:46,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:47,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:47,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:47,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:47,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:47,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:47,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-28 10:13:47,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:13:47,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:13:47,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:13:47,515 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-28 10:13:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:47,649 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:13:47,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:13:47,650 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-28 10:13:47,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:47,651 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:13:47,651 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:13:47,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:13:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:13:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:13:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:13:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-28 10:13:47,656 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-28 10:13:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:47,657 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-28 10:13:47,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:13:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-28 10:13:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:13:47,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:47,658 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-28 10:13:47,658 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:47,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:47,658 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-28 10:13:47,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:47,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:47,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:47,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:47,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:48,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:48,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:48,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:48,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:48,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:48,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:48,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:48,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-28 10:13:48,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:13:48,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:13:48,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:13:48,608 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-28 10:13:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:48,753 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:13:48,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:13:48,753 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-28 10:13:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:48,754 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:13:48,754 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:13:48,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:13:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:13:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:13:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:13:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-28 10:13:48,760 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-28 10:13:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:48,760 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-28 10:13:48,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:13:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-28 10:13:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:13:48,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:48,761 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-28 10:13:48,761 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:48,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:48,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-28 10:13:48,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:48,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:48,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:48,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:48,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:49,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:49,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:49,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:49,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-28 10:13:49,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:49,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:50,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:50,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-28 10:13:50,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:13:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:13:50,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:13:50,020 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-28 10:13:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:50,164 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:13:50,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:13:50,165 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-28 10:13:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:50,166 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:13:50,166 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:13:50,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:13:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:13:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:13:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:13:50,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-28 10:13:50,171 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-28 10:13:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:50,171 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-28 10:13:50,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:13:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-28 10:13:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:13:50,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:50,172 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-28 10:13:50,172 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:50,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-28 10:13:50,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:50,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:50,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:50,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:50,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:50,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:50,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:50,875 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:13:50,916 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:13:50,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:50,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:52,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:52,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-28 10:13:52,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:13:52,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:13:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:13:52,034 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-28 10:13:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:52,316 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:13:52,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:13:52,316 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-28 10:13:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:52,317 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:13:52,317 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:13:52,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:13:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:13:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-28 10:13:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:13:52,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-28 10:13:52,322 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-28 10:13:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:52,323 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-28 10:13:52,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:13:52,323 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-28 10:13:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-28 10:13:52,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:52,324 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-28 10:13:52,324 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:52,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:52,324 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-28 10:13:52,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:52,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:52,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:52,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:52,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:52,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:52,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:52,820 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:13:52,847 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-28 10:13:52,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:52,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:53,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:53,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-28 10:13:53,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:13:53,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:13:53,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:13:53,434 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-28 10:13:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:53,575 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:13:53,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:13:53,576 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-28 10:13:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:53,577 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:13:53,577 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:13:53,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:13:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:13:53,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:13:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:13:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-28 10:13:53,581 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-28 10:13:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:53,581 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-28 10:13:53,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:13:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-28 10:13:53,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-28 10:13:53,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:53,582 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-28 10:13:53,582 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:53,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:53,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-28 10:13:53,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:53,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:53,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:53,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:53,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:54,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:54,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:54,119 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:13:54,159 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:13:54,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:54,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:54,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:54,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-28 10:13:54,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:13:54,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:13:54,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:13:54,827 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-28 10:13:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:54,944 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:13:54,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:13:54,944 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-28 10:13:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:54,945 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:13:54,945 INFO L226 Difference]: Without dead ends: 66 [2018-09-28 10:13:54,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:13:54,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-28 10:13:54,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-28 10:13:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:13:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-28 10:13:54,950 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-28 10:13:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:54,950 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-28 10:13:54,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:13:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-28 10:13:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:13:54,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:54,951 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-28 10:13:54,951 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:54,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:54,952 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-28 10:13:54,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:54,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:54,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:54,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:54,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:55,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:55,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:55,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:55,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:56,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:56,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-28 10:13:56,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:13:56,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:13:56,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:13:56,456 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-28 10:13:56,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:56,638 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:13:56,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:13:56,638 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-28 10:13:56,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:56,639 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:13:56,639 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:13:56,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:13:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:13:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:13:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:13:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-28 10:13:56,644 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-28 10:13:56,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:56,644 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-28 10:13:56,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:13:56,644 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-28 10:13:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-28 10:13:56,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:56,645 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-28 10:13:56,645 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:56,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:56,645 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-28 10:13:56,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:56,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:56,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:56,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:13:56,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:57,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:57,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:57,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:13:57,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:13:57,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:57,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:58,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:58,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-28 10:13:58,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:13:58,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:13:58,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:13:58,141 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-28 10:13:58,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:58,276 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:13:58,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:13:58,276 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-28 10:13:58,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:58,277 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:13:58,277 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:13:58,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:13:58,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:13:58,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:13:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:13:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-28 10:13:58,283 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-28 10:13:58,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:58,283 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-28 10:13:58,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:13:58,283 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-28 10:13:58,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-28 10:13:58,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:58,284 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-28 10:13:58,284 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:58,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:58,284 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-28 10:13:58,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:58,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:58,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:58,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:58,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:13:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:58,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:13:58,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:13:58,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:13:58,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-28 10:13:58,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:13:58,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:13:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:13:59,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:13:59,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-28 10:13:59,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:13:59,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:13:59,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:13:59,660 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-28 10:13:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:13:59,825 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:13:59,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:13:59,825 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-28 10:13:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:13:59,826 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:13:59,826 INFO L226 Difference]: Without dead ends: 72 [2018-09-28 10:13:59,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:13:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-28 10:13:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-28 10:13:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:13:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-28 10:13:59,831 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-28 10:13:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:13:59,831 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-28 10:13:59,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:13:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-28 10:13:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:13:59,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:13:59,832 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-28 10:13:59,832 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:13:59,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:13:59,833 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-28 10:13:59,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:13:59,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:13:59,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:59,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:13:59,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:13:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:00,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:00,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:00,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:00,451 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:00,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:00,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:01,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:01,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-28 10:14:01,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:14:01,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:14:01,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:14:01,499 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-28 10:14:01,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:01,720 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:14:01,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:14:01,720 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-28 10:14:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:01,721 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:14:01,722 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:14:01,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:14:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:14:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-28 10:14:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:14:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-28 10:14:01,727 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-28 10:14:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:01,727 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-28 10:14:01,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:14:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-28 10:14:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-28 10:14:01,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:01,728 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-28 10:14:01,728 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:01,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:01,728 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-28 10:14:01,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:01,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:01,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:01,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:01,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:02,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:02,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:02,734 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:02,769 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-28 10:14:02,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:02,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:03,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:03,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-28 10:14:03,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:14:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:14:03,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:14:03,628 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-28 10:14:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:03,958 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:14:03,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:14:03,958 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-28 10:14:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:03,959 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:14:03,959 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:14:03,960 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 [2018-09-28 10:14:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:14:03,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:14:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:14:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-28 10:14:03,964 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-28 10:14:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:03,964 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-28 10:14:03,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:14:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-28 10:14:03,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-28 10:14:03,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:03,964 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-28 10:14:03,964 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:03,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:03,965 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-28 10:14:03,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:03,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:03,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:03,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:03,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:04,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:04,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:04,748 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:04,780 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:14:04,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:04,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:05,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:05,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-28 10:14:05,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:14:05,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:14:05,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:14:05,630 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-28 10:14:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:05,808 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-28 10:14:05,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:14:05,809 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-28 10:14:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:05,810 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:14:05,810 INFO L226 Difference]: Without dead ends: 78 [2018-09-28 10:14:05,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:14:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-28 10:14:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-28 10:14:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-28 10:14:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-28 10:14:05,815 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-28 10:14:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:05,815 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-28 10:14:05,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:14:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-28 10:14:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-28 10:14:05,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:05,816 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-28 10:14:05,817 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:05,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:05,817 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-28 10:14:05,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:05,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:05,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:05,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:05,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:07,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:07,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:07,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:07,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:07,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:07,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-28 10:14:07,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:14:07,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:14:07,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:14:07,970 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-28 10:14:08,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:08,134 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-28 10:14:08,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:14:08,134 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-28 10:14:08,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:08,135 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:14:08,136 INFO L226 Difference]: Without dead ends: 80 [2018-09-28 10:14:08,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:14:08,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-28 10:14:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-28 10:14:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-28 10:14:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-28 10:14:08,140 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-28 10:14:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:08,141 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-28 10:14:08,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:14:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-28 10:14:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-28 10:14:08,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:08,141 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-28 10:14:08,142 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:08,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:08,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-28 10:14:08,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:08,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:08,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:08,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:08,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:09,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:09,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:09,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:09,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:09,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:09,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:10,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:10,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-28 10:14:10,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:14:10,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:14:10,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:14:10,577 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-28 10:14:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:10,743 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-28 10:14:10,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:14:10,744 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-28 10:14:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:10,745 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:14:10,745 INFO L226 Difference]: Without dead ends: 82 [2018-09-28 10:14:10,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:14:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-28 10:14:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-28 10:14:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:14:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-28 10:14:10,749 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-28 10:14:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:10,749 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-28 10:14:10,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:14:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-28 10:14:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-28 10:14:10,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:10,750 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-28 10:14:10,750 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:10,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:10,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-28 10:14:10,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:10,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:10,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:10,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:10,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:11,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:11,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:11,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:12,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-28 10:14:12,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:12,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:13,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:13,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-28 10:14:13,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:14:13,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:14:13,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:14:13,048 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-28 10:14:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:13,234 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-28 10:14:13,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:14:13,234 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-28 10:14:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:13,235 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:14:13,236 INFO L226 Difference]: Without dead ends: 84 [2018-09-28 10:14:13,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:14:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-28 10:14:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-28 10:14:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-28 10:14:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-28 10:14:13,240 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-28 10:14:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:13,240 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-28 10:14:13,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:14:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-28 10:14:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-28 10:14:13,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:13,241 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-28 10:14:13,241 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:13,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-28 10:14:13,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:13,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:13,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:13,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:13,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:14,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:14,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:14,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:14,069 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:14,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:14,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:15,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:15,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-28 10:14:15,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:14:15,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:14:15,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:14:15,128 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-28 10:14:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:15,299 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-28 10:14:15,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:14:15,299 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-28 10:14:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:15,300 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:14:15,301 INFO L226 Difference]: Without dead ends: 86 [2018-09-28 10:14:15,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:14:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-28 10:14:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-28 10:14:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-28 10:14:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-28 10:14:15,305 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-28 10:14:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:15,306 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-28 10:14:15,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:14:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-28 10:14:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-28 10:14:15,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:15,306 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-28 10:14:15,306 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:15,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:15,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-28 10:14:15,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:15,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:15,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:15,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:15,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:16,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:16,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:16,531 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:16,571 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-28 10:14:16,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:16,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:17,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:17,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-28 10:14:17,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:14:17,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:14:17,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:14:17,736 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-28 10:14:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:18,020 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-28 10:14:18,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:14:18,020 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-28 10:14:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:18,021 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:14:18,021 INFO L226 Difference]: Without dead ends: 88 [2018-09-28 10:14:18,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:14:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-28 10:14:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-28 10:14:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-28 10:14:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-28 10:14:18,027 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-28 10:14:18,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:18,027 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-28 10:14:18,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:14:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-28 10:14:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-28 10:14:18,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:18,028 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-28 10:14:18,028 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:18,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:18,029 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-28 10:14:18,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:18,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:18,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:18,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:18,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:18,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:18,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:18,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:18,998 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-28 10:14:18,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:19,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:20,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:20,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-28 10:14:20,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:14:20,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:14:20,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:14:20,253 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-28 10:14:20,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:20,465 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-28 10:14:20,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:14:20,466 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-28 10:14:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:20,467 INFO L225 Difference]: With dead ends: 91 [2018-09-28 10:14:20,467 INFO L226 Difference]: Without dead ends: 90 [2018-09-28 10:14:20,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:14:20,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-28 10:14:20,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-28 10:14:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-28 10:14:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-28 10:14:20,472 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-28 10:14:20,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:20,472 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-28 10:14:20,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:14:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-28 10:14:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-28 10:14:20,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:20,473 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-28 10:14:20,473 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:20,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:20,473 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-28 10:14:20,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:20,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:20,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:20,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:20,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:21,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:21,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:21,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:21,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:22,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:22,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-28 10:14:22,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:14:22,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:14:22,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:14:22,760 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-28 10:14:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:22,941 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-28 10:14:22,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:14:22,941 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-28 10:14:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:22,942 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:14:22,943 INFO L226 Difference]: Without dead ends: 92 [2018-09-28 10:14:22,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:14:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-28 10:14:22,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-28 10:14:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-28 10:14:22,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-28 10:14:22,947 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-28 10:14:22,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:22,947 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-28 10:14:22,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:14:22,948 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-28 10:14:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-28 10:14:22,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:22,948 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-28 10:14:22,948 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:22,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:22,949 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-28 10:14:22,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:22,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:22,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:22,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:22,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:24,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:24,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:24,218 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:24,245 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:24,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:24,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:25,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:25,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-28 10:14:25,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:14:25,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:14:25,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:14:25,491 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-28 10:14:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:25,682 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-28 10:14:25,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:14:25,683 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-28 10:14:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:25,684 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:14:25,684 INFO L226 Difference]: Without dead ends: 94 [2018-09-28 10:14:25,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:14:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-28 10:14:25,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-28 10:14:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-28 10:14:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-28 10:14:25,689 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-28 10:14:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:25,689 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-28 10:14:25,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:14:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-28 10:14:25,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-28 10:14:25,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:25,690 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-28 10:14:25,690 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:25,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:25,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-28 10:14:25,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:25,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:25,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:25,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:25,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:27,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:27,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:27,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:27,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-28 10:14:27,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:27,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:28,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-28 10:14:28,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:14:28,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:14:28,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:14:28,671 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-28 10:14:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:28,912 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-28 10:14:28,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:14:28,913 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-28 10:14:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:28,914 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:14:28,914 INFO L226 Difference]: Without dead ends: 96 [2018-09-28 10:14:28,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:14:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-28 10:14:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-28 10:14:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-28 10:14:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-28 10:14:28,919 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-28 10:14:28,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:28,919 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-28 10:14:28,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:14:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-28 10:14:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-28 10:14:28,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:28,920 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-28 10:14:28,920 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:28,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:28,920 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-28 10:14:28,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:28,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:28,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:28,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:30,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:30,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:30,060 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:30,088 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:30,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:30,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:31,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:31,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-28 10:14:31,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:14:31,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:14:31,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:14:31,447 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-28 10:14:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:31,695 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-28 10:14:31,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:14:31,696 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-28 10:14:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:31,696 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:14:31,696 INFO L226 Difference]: Without dead ends: 98 [2018-09-28 10:14:31,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:14:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-28 10:14:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-28 10:14:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-28 10:14:31,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-28 10:14:31,700 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-28 10:14:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:31,700 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-28 10:14:31,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:14:31,701 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-28 10:14:31,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-28 10:14:31,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:31,701 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-28 10:14:31,701 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:31,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:31,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-28 10:14:31,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:31,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:31,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:31,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:32,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:32,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:32,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:32,859 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-28 10:14:32,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:32,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:34,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:34,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-28 10:14:34,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:14:34,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:14:34,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:14:34,280 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-28 10:14:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:34,520 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-28 10:14:34,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:14:34,520 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-28 10:14:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:34,522 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:14:34,522 INFO L226 Difference]: Without dead ends: 100 [2018-09-28 10:14:34,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:14:34,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-28 10:14:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-28 10:14:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-28 10:14:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-28 10:14:34,528 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-28 10:14:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:34,528 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-28 10:14:34,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:14:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-28 10:14:34,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-28 10:14:34,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:34,529 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-28 10:14:34,529 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:34,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:34,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-28 10:14:34,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:34,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:34,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:34,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:34,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:35,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:35,829 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:35,876 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-28 10:14:35,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:35,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:37,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-28 10:14:37,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:14:37,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:14:37,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:14:37,554 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-28 10:14:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:37,807 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-28 10:14:37,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:14:37,808 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-28 10:14:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:37,808 INFO L225 Difference]: With dead ends: 103 [2018-09-28 10:14:37,808 INFO L226 Difference]: Without dead ends: 102 [2018-09-28 10:14:37,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:14:37,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-28 10:14:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-28 10:14:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-28 10:14:37,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-28 10:14:37,813 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-28 10:14:37,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:37,814 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-28 10:14:37,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:14:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-28 10:14:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-28 10:14:37,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:37,814 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-28 10:14:37,814 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:37,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:37,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-28 10:14:37,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:37,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:37,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:37,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:39,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:39,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:39,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:39,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:40,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:40,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-28 10:14:40,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:14:40,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:14:40,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:14:40,948 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-28 10:14:41,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:41,207 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-28 10:14:41,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:14:41,207 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-28 10:14:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:41,209 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:14:41,209 INFO L226 Difference]: Without dead ends: 104 [2018-09-28 10:14:41,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:14:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-28 10:14:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-28 10:14:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-28 10:14:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-28 10:14:41,214 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-28 10:14:41,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:41,215 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-28 10:14:41,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:14:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-28 10:14:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-28 10:14:41,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:41,216 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-28 10:14:41,216 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:41,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:41,216 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-28 10:14:41,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:41,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:41,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:41,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:42,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:42,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:42,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:42,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:42,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:42,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:44,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-28 10:14:44,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:14:44,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:14:44,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:14:44,215 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-28 10:14:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:45,883 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-28 10:14:45,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:14:45,883 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-28 10:14:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:45,884 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:14:45,884 INFO L226 Difference]: Without dead ends: 106 [2018-09-28 10:14:45,885 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 [2018-09-28 10:14:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-28 10:14:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-28 10:14:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-28 10:14:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-28 10:14:45,890 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-28 10:14:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:45,890 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-28 10:14:45,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:14:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-28 10:14:45,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-28 10:14:45,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:45,891 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-28 10:14:45,891 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:45,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:45,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-28 10:14:45,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:45,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:45,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:45,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:47,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:47,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:47,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:47,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-28 10:14:47,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:47,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:49,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:49,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-28 10:14:49,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-28 10:14:49,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-28 10:14:49,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:14:49,202 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-28 10:14:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:49,419 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-28 10:14:49,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:14:49,420 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-28 10:14:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:49,421 INFO L225 Difference]: With dead ends: 109 [2018-09-28 10:14:49,421 INFO L226 Difference]: Without dead ends: 108 [2018-09-28 10:14:49,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:14:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-28 10:14:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-28 10:14:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-28 10:14:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-28 10:14:49,428 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-28 10:14:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:49,428 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-28 10:14:49,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-28 10:14:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-28 10:14:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-28 10:14:49,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:49,429 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-28 10:14:49,429 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:49,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:49,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-28 10:14:49,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:49,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:49,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:49,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:49,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:50,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:50,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:50,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:50,771 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:50,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:50,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:53,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:53,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-28 10:14:53,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-28 10:14:53,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-28 10:14:53,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:14:53,047 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-28 10:14:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:53,258 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-28 10:14:53,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:14:53,258 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-28 10:14:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:53,260 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:14:53,260 INFO L226 Difference]: Without dead ends: 110 [2018-09-28 10:14:53,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:14:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-28 10:14:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-28 10:14:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-28 10:14:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-28 10:14:53,265 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-28 10:14:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:53,265 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-28 10:14:53,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-28 10:14:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-28 10:14:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-28 10:14:53,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:53,266 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-28 10:14:53,266 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:53,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-28 10:14:53,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:53,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:53,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:53,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:53,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:54,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:54,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:54,570 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:54,690 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-28 10:14:54,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:54,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:56,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:56,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-28 10:14:56,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-28 10:14:56,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-28 10:14:56,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:14:56,567 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-28 10:14:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:56,789 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-28 10:14:56,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:14:56,790 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-28 10:14:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:56,791 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:14:56,791 INFO L226 Difference]: Without dead ends: 112 [2018-09-28 10:14:56,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:14:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-28 10:14:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-28 10:14:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-28 10:14:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-28 10:14:56,795 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-28 10:14:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:56,796 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-28 10:14:56,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-28 10:14:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-28 10:14:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-28 10:14:56,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:56,796 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-28 10:14:56,796 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:56,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:56,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-28 10:14:56,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:56,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:56,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:56,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:56,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:58,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:58,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:58,599 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:58,651 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-28 10:14:58,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:58,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:00,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:00,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-28 10:15:00,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-28 10:15:00,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-28 10:15:00,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-28 10:15:00,513 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-28 10:15:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:00,782 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-28 10:15:00,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:15:00,783 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-28 10:15:00,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:00,784 INFO L225 Difference]: With dead ends: 115 [2018-09-28 10:15:00,784 INFO L226 Difference]: Without dead ends: 114 [2018-09-28 10:15:00,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-28 10:15:00,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-28 10:15:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-28 10:15:00,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-28 10:15:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-28 10:15:00,791 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-28 10:15:00,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:00,791 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-28 10:15:00,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-28 10:15:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-28 10:15:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-28 10:15:00,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:00,792 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-28 10:15:00,792 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:00,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:00,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-28 10:15:00,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:00,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:00,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:00,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:00,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:02,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:02,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:02,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:02,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:04,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:04,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-28 10:15:04,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-28 10:15:04,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-28 10:15:04,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-28 10:15:04,558 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-28 10:15:05,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:05,084 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-28 10:15:05,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:15:05,084 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-28 10:15:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:05,085 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:15:05,085 INFO L226 Difference]: Without dead ends: 116 [2018-09-28 10:15:05,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-28 10:15:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-28 10:15:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-28 10:15:05,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-28 10:15:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-28 10:15:05,092 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-28 10:15:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:05,092 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-28 10:15:05,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-28 10:15:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-28 10:15:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-28 10:15:05,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:05,093 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-28 10:15:05,093 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:05,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-28 10:15:05,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:05,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:05,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:05,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:05,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:06,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:06,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:06,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:06,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:06,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:06,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:08,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:08,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-28 10:15:08,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-28 10:15:08,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-28 10:15:08,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-28 10:15:08,759 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-28 10:15:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:09,070 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-28 10:15:09,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:15:09,070 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-28 10:15:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:09,071 INFO L225 Difference]: With dead ends: 119 [2018-09-28 10:15:09,072 INFO L226 Difference]: Without dead ends: 118 [2018-09-28 10:15:09,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-28 10:15:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-28 10:15:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-28 10:15:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-28 10:15:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-28 10:15:09,077 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-28 10:15:09,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:09,077 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-28 10:15:09,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-28 10:15:09,077 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-28 10:15:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-28 10:15:09,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:09,077 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-28 10:15:09,078 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:09,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:09,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-28 10:15:09,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:09,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:09,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:09,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:09,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:11,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:11,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:11,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:11,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-28 10:15:11,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:11,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:13,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-28 10:15:13,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-28 10:15:13,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-28 10:15:13,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-28 10:15:13,500 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-28 10:15:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:13,770 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-28 10:15:13,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:15:13,771 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-28 10:15:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:13,772 INFO L225 Difference]: With dead ends: 121 [2018-09-28 10:15:13,772 INFO L226 Difference]: Without dead ends: 120 [2018-09-28 10:15:13,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-28 10:15:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-28 10:15:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-28 10:15:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-28 10:15:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-28 10:15:13,777 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-28 10:15:13,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:13,777 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-28 10:15:13,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-28 10:15:13,777 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-28 10:15:13,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-28 10:15:13,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:13,778 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-28 10:15:13,778 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:13,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:13,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-28 10:15:13,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:13,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:13,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:13,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:15,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:15,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:15,287 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:15,319 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:15,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:15,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:18,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:18,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-28 10:15:18,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-28 10:15:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-28 10:15:18,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-28 10:15:18,530 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-28 10:15:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:18,818 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-28 10:15:18,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:15:18,819 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-28 10:15:18,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:18,820 INFO L225 Difference]: With dead ends: 123 [2018-09-28 10:15:18,820 INFO L226 Difference]: Without dead ends: 122 [2018-09-28 10:15:18,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-28 10:15:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-28 10:15:18,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-28 10:15:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-28 10:15:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-28 10:15:18,825 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-28 10:15:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:18,825 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-28 10:15:18,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-28 10:15:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-28 10:15:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-28 10:15:18,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:18,826 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-28 10:15:18,827 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:18,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:18,827 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-28 10:15:18,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:18,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:18,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:18,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:20,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:20,527 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 [2018-09-28 10:15:20,534 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:20,600 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-28 10:15:20,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:20,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:23,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-28 10:15:23,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-28 10:15:23,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-28 10:15:23,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-28 10:15:23,010 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-28 10:15:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:23,286 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-28 10:15:23,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:15:23,287 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-28 10:15:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:23,287 INFO L225 Difference]: With dead ends: 125 [2018-09-28 10:15:23,288 INFO L226 Difference]: Without dead ends: 124 [2018-09-28 10:15:23,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-28 10:15:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-28 10:15:23,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-28 10:15:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-28 10:15:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-28 10:15:23,293 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-28 10:15:23,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:23,293 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-28 10:15:23,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-28 10:15:23,293 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-28 10:15:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-28 10:15:23,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:23,294 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-28 10:15:23,294 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:23,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-28 10:15:23,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:23,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:23,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:23,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:25,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:25,855 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:25,919 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-28 10:15:25,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:25,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:28,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:28,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-28 10:15:28,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-28 10:15:28,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-28 10:15:28,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-28 10:15:28,337 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-28 10:15:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:28,588 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-28 10:15:28,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:15:28,588 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-28 10:15:28,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:28,589 INFO L225 Difference]: With dead ends: 127 [2018-09-28 10:15:28,589 INFO L226 Difference]: Without dead ends: 126 [2018-09-28 10:15:28,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-28 10:15:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-28 10:15:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-28 10:15:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-28 10:15:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-28 10:15:28,594 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-28 10:15:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:28,594 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-28 10:15:28,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-28 10:15:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-28 10:15:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-28 10:15:28,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:28,595 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-28 10:15:28,595 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:28,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:28,596 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-28 10:15:28,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:28,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:28,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:28,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:28,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:30,246 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 [2018-09-28 10:15:30,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:30,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:32,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-28 10:15:32,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-28 10:15:32,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-28 10:15:32,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-28 10:15:32,415 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-28 10:15:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:32,710 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-28 10:15:32,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:15:32,710 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-28 10:15:32,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:32,711 INFO L225 Difference]: With dead ends: 129 [2018-09-28 10:15:32,711 INFO L226 Difference]: Without dead ends: 128 [2018-09-28 10:15:32,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-28 10:15:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-28 10:15:32,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-28 10:15:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-28 10:15:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-28 10:15:32,715 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-28 10:15:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:32,715 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-28 10:15:32,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-28 10:15:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-28 10:15:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-28 10:15:32,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:32,716 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-28 10:15:32,716 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:32,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:32,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-28 10:15:32,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:32,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:32,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:32,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:34,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:34,831 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 [2018-09-28 10:15:34,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:34,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:34,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:34,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:37,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:37,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-28 10:15:37,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-28 10:15:37,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-28 10:15:37,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-28 10:15:37,074 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-28 10:15:37,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:37,328 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-28 10:15:37,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:15:37,328 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-28 10:15:37,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:37,329 INFO L225 Difference]: With dead ends: 131 [2018-09-28 10:15:37,330 INFO L226 Difference]: Without dead ends: 130 [2018-09-28 10:15:37,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-28 10:15:37,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-28 10:15:37,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-28 10:15:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-28 10:15:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-28 10:15:37,335 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-28 10:15:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:37,335 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-28 10:15:37,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-28 10:15:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-28 10:15:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-28 10:15:37,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:37,336 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-28 10:15:37,336 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:37,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-28 10:15:37,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:37,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:37,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:37,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:37,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:39,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:39,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:39,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:39,440 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-28 10:15:39,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:39,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:41,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:41,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-28 10:15:41,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-28 10:15:41,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-28 10:15:41,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-28 10:15:41,729 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-28 10:15:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:42,039 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-28 10:15:42,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:15:42,040 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-28 10:15:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:42,041 INFO L225 Difference]: With dead ends: 133 [2018-09-28 10:15:42,041 INFO L226 Difference]: Without dead ends: 132 [2018-09-28 10:15:42,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-28 10:15:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-28 10:15:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-28 10:15:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-28 10:15:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-28 10:15:42,046 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-28 10:15:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:42,046 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-28 10:15:42,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-28 10:15:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-28 10:15:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-28 10:15:42,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:42,047 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-28 10:15:42,047 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:42,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:42,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-28 10:15:42,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:42,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:42,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:42,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:42,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:44,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:44,167 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 [2018-09-28 10:15:44,177 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:44,215 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:44,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:44,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:46,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:46,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-28 10:15:46,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-28 10:15:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-28 10:15:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-28 10:15:46,551 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-28 10:15:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:46,811 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-28 10:15:46,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:15:46,812 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-28 10:15:46,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:46,813 INFO L225 Difference]: With dead ends: 135 [2018-09-28 10:15:46,813 INFO L226 Difference]: Without dead ends: 134 [2018-09-28 10:15:46,814 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 [2018-09-28 10:15:46,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-28 10:15:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-28 10:15:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-28 10:15:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-28 10:15:46,818 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-28 10:15:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:46,818 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-28 10:15:46,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-28 10:15:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-28 10:15:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-28 10:15:46,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:46,819 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-28 10:15:46,820 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:46,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:46,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-28 10:15:46,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:46,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:46,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:46,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:48,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:48,937 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 [2018-09-28 10:15:48,944 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:49,016 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-28 10:15:49,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:49,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:52,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:52,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-28 10:15:52,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-28 10:15:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-28 10:15:52,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-28 10:15:52,257 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-28 10:15:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:52,607 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-28 10:15:52,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:15:52,608 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-28 10:15:52,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:52,609 INFO L225 Difference]: With dead ends: 137 [2018-09-28 10:15:52,609 INFO L226 Difference]: Without dead ends: 136 [2018-09-28 10:15:52,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-28 10:15:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-28 10:15:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-28 10:15:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-28 10:15:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-28 10:15:52,615 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-28 10:15:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:52,616 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-28 10:15:52,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-28 10:15:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-28 10:15:52,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-28 10:15:52,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:52,617 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-28 10:15:52,617 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:52,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:52,617 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-28 10:15:52,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:52,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:52,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:52,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:54,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:54,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:15:54,901 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:54,974 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-28 10:15:54,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:54,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:57,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:57,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-28 10:15:57,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-28 10:15:57,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-28 10:15:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-28 10:15:57,453 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-28 10:15:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:57,785 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-28 10:15:57,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:15:57,785 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-28 10:15:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:57,786 INFO L225 Difference]: With dead ends: 139 [2018-09-28 10:15:57,786 INFO L226 Difference]: Without dead ends: 138 [2018-09-28 10:15:57,787 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 [2018-09-28 10:15:57,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-28 10:15:57,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-28 10:15:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-28 10:15:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-28 10:15:57,790 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-28 10:15:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:57,790 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-28 10:15:57,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-28 10:15:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-28 10:15:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-28 10:15:57,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:57,791 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-28 10:15:57,791 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:57,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:57,792 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-28 10:15:57,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:57,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:57,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:57,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:57,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:00,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:00,074 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 [2018-09-28 10:16:00,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:00,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:02,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:02,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-28 10:16:02,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-28 10:16:02,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-28 10:16:02,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-28 10:16:02,679 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-28 10:16:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:02,990 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-28 10:16:02,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:16:02,991 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-28 10:16:02,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:02,992 INFO L225 Difference]: With dead ends: 141 [2018-09-28 10:16:02,992 INFO L226 Difference]: Without dead ends: 140 [2018-09-28 10:16:02,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-28 10:16:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-28 10:16:02,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-28 10:16:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-28 10:16:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-28 10:16:02,997 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-28 10:16:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:02,998 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-28 10:16:02,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-28 10:16:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-28 10:16:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-28 10:16:02,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:02,999 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-28 10:16:02,999 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:02,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:02,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-28 10:16:02,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:02,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:03,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:03,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:03,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:05,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:05,296 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 [2018-09-28 10:16:05,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:05,339 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:05,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:05,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:07,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:07,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-28 10:16:07,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-28 10:16:07,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-28 10:16:07,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-28 10:16:07,910 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-28 10:16:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:08,236 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-28 10:16:08,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:16:08,236 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-28 10:16:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:08,238 INFO L225 Difference]: With dead ends: 143 [2018-09-28 10:16:08,238 INFO L226 Difference]: Without dead ends: 142 [2018-09-28 10:16:08,239 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 [2018-09-28 10:16:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-28 10:16:08,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-28 10:16:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-28 10:16:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-28 10:16:08,243 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-28 10:16:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:08,243 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-28 10:16:08,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-28 10:16:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-28 10:16:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-28 10:16:08,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:08,244 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-28 10:16:08,244 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:08,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:08,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-28 10:16:08,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:08,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:08,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:08,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:08,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:10,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:10,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:10,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:10,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-28 10:16:10,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:10,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:13,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:13,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-28 10:16:13,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-28 10:16:13,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-28 10:16:13,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-28 10:16:13,371 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-28 10:16:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:13,745 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-28 10:16:13,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:16:13,745 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-28 10:16:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:13,746 INFO L225 Difference]: With dead ends: 145 [2018-09-28 10:16:13,747 INFO L226 Difference]: Without dead ends: 144 [2018-09-28 10:16:13,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-28 10:16:13,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-28 10:16:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-28 10:16:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-28 10:16:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-28 10:16:13,752 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-28 10:16:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:13,752 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-28 10:16:13,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-28 10:16:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-28 10:16:13,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-28 10:16:13,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:13,753 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-28 10:16:13,753 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:13,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:13,753 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-28 10:16:13,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:13,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:13,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:13,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:13,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:16,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:16,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:16,129 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:16,170 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:16,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:16,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:19,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:19,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-28 10:16:19,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-28 10:16:19,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-28 10:16:19,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-28 10:16:19,339 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-28 10:16:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:19,735 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-28 10:16:19,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:16:19,735 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-28 10:16:19,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:19,736 INFO L225 Difference]: With dead ends: 147 [2018-09-28 10:16:19,736 INFO L226 Difference]: Without dead ends: 146 [2018-09-28 10:16:19,737 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 [2018-09-28 10:16:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-28 10:16:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-28 10:16:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-28 10:16:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-28 10:16:19,742 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-28 10:16:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:19,743 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-28 10:16:19,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-28 10:16:19,743 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-28 10:16:19,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-28 10:16:19,743 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:19,743 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-28 10:16:19,744 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:19,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:19,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-28 10:16:19,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:19,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:19,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:19,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:19,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:22,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:22,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:22,083 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:22,283 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-28 10:16:22,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:22,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:25,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:25,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-28 10:16:25,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-28 10:16:25,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-28 10:16:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-28 10:16:25,733 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-28 10:16:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:26,091 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-28 10:16:26,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:16:26,092 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-28 10:16:26,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:26,093 INFO L225 Difference]: With dead ends: 149 [2018-09-28 10:16:26,094 INFO L226 Difference]: Without dead ends: 148 [2018-09-28 10:16:26,095 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 [2018-09-28 10:16:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-28 10:16:26,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-28 10:16:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-28 10:16:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-28 10:16:26,099 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-28 10:16:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:26,099 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-28 10:16:26,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-28 10:16:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-28 10:16:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-28 10:16:26,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:26,101 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-28 10:16:26,101 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:26,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-28 10:16:26,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:26,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:26,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:26,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:26,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:28,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:28,408 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 [2018-09-28 10:16:28,414 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:28,507 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-28 10:16:28,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:28,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:31,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:31,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-28 10:16:31,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-28 10:16:31,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-28 10:16:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-28 10:16:31,675 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-28 10:16:32,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:32,277 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-28 10:16:32,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:16:32,278 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-28 10:16:32,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:32,279 INFO L225 Difference]: With dead ends: 151 [2018-09-28 10:16:32,279 INFO L226 Difference]: Without dead ends: 150 [2018-09-28 10:16:32,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-28 10:16:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-28 10:16:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-28 10:16:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-28 10:16:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-28 10:16:32,285 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-28 10:16:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:32,286 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-28 10:16:32,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-28 10:16:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-28 10:16:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-28 10:16:32,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:32,287 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-28 10:16:32,287 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:32,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:32,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-28 10:16:32,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:32,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:32,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:32,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:32,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:34,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:34,894 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 [2018-09-28 10:16:34,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:34,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:37,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:37,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-28 10:16:37,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-28 10:16:37,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-28 10:16:37,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-28 10:16:37,979 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-28 10:16:38,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:38,349 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-28 10:16:38,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:16:38,350 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-28 10:16:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:38,351 INFO L225 Difference]: With dead ends: 153 [2018-09-28 10:16:38,351 INFO L226 Difference]: Without dead ends: 152 [2018-09-28 10:16:38,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-28 10:16:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-28 10:16:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-28 10:16:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-28 10:16:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-28 10:16:38,357 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-28 10:16:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:38,357 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-28 10:16:38,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-28 10:16:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-28 10:16:38,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-28 10:16:38,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:38,359 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-28 10:16:38,359 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:38,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-28 10:16:38,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:38,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:38,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:38,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:38,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:41,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:41,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:16:41,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:41,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:41,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:41,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:44,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:44,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-28 10:16:44,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-28 10:16:44,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-28 10:16:44,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-28 10:16:44,176 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-28 10:16:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:44,657 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-28 10:16:44,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:16:44,657 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-28 10:16:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:44,658 INFO L225 Difference]: With dead ends: 155 [2018-09-28 10:16:44,658 INFO L226 Difference]: Without dead ends: 154 [2018-09-28 10:16:44,659 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 [2018-09-28 10:16:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-28 10:16:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-28 10:16:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-28 10:16:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-28 10:16:44,663 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-28 10:16:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:44,664 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-28 10:16:44,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-28 10:16:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-28 10:16:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-28 10:16:44,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:44,665 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-28 10:16:44,665 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:44,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:44,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-28 10:16:44,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:44,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:44,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:44,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:44,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:47,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:47,217 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 [2018-09-28 10:16:47,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:47,313 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-28 10:16:47,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:47,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:50,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:50,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-28 10:16:50,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-28 10:16:50,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-28 10:16:50,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-28 10:16:50,679 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-28 10:16:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:51,105 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-28 10:16:51,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:16:51,106 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-28 10:16:51,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:51,107 INFO L225 Difference]: With dead ends: 157 [2018-09-28 10:16:51,107 INFO L226 Difference]: Without dead ends: 156 [2018-09-28 10:16:51,108 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 [2018-09-28 10:16:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-28 10:16:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-28 10:16:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-28 10:16:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-28 10:16:51,112 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-28 10:16:51,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:51,113 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-28 10:16:51,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-28 10:16:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-28 10:16:51,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-28 10:16:51,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:51,113 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-28 10:16:51,114 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:51,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-28 10:16:51,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:51,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:51,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:51,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:51,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:53,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:53,638 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 [2018-09-28 10:16:53,646 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:53,691 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:53,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:53,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:57,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:57,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-28 10:16:57,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-28 10:16:57,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-28 10:16:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-28 10:16:57,082 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-28 10:16:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:57,441 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-28 10:16:57,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:16:57,441 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-28 10:16:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:57,442 INFO L225 Difference]: With dead ends: 159 [2018-09-28 10:16:57,442 INFO L226 Difference]: Without dead ends: 158 [2018-09-28 10:16:57,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-28 10:16:57,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-28 10:16:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-28 10:16:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-28 10:16:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-28 10:16:57,448 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-28 10:16:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:57,448 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-28 10:16:57,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-28 10:16:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-28 10:16:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-28 10:16:57,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:57,449 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-28 10:16:57,449 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:57,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:57,450 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-28 10:16:57,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:57,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:57,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:57,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:57,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:00,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:00,233 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 [2018-09-28 10:17:00,240 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:00,395 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-28 10:17:00,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:00,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:03,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:03,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-28 10:17:03,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-28 10:17:03,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-28 10:17:03,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-28 10:17:03,642 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-28 10:17:04,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:04,025 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-28 10:17:04,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:17:04,025 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-28 10:17:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:04,026 INFO L225 Difference]: With dead ends: 161 [2018-09-28 10:17:04,027 INFO L226 Difference]: Without dead ends: 160 [2018-09-28 10:17:04,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-28 10:17:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-28 10:17:04,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-28 10:17:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-28 10:17:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-28 10:17:04,033 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-28 10:17:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:04,034 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-28 10:17:04,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-28 10:17:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-28 10:17:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-28 10:17:04,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:04,035 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-28 10:17:04,035 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:04,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:04,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-28 10:17:04,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:04,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:04,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:04,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:04,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:06,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:06,851 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 [2018-09-28 10:17:06,858 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:06,988 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-28 10:17:06,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:06,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:10,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:10,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-28 10:17:10,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-28 10:17:10,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-28 10:17:10,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-28 10:17:10,565 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-28 10:17:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:10,973 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-28 10:17:10,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:17:10,973 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-28 10:17:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:10,974 INFO L225 Difference]: With dead ends: 163 [2018-09-28 10:17:10,974 INFO L226 Difference]: Without dead ends: 162 [2018-09-28 10:17:10,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-28 10:17:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-28 10:17:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-28 10:17:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-28 10:17:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-28 10:17:10,979 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-28 10:17:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:10,979 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-28 10:17:10,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-28 10:17:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-28 10:17:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-28 10:17:10,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:10,980 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-28 10:17:10,980 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:10,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:10,980 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-28 10:17:10,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:10,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:10,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:10,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:10,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:13,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:13,775 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 [2018-09-28 10:17:13,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:13,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:17,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:17,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-28 10:17:17,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-28 10:17:17,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-28 10:17:17,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-28 10:17:17,491 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-28 10:17:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:17,880 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-28 10:17:17,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:17:17,881 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-28 10:17:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:17,882 INFO L225 Difference]: With dead ends: 165 [2018-09-28 10:17:17,882 INFO L226 Difference]: Without dead ends: 164 [2018-09-28 10:17:17,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-28 10:17:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-28 10:17:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-28 10:17:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-28 10:17:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-28 10:17:17,888 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-28 10:17:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:17,888 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-28 10:17:17,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-28 10:17:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-28 10:17:17,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-28 10:17:17,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:17,890 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-28 10:17:17,890 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:17,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:17,890 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-28 10:17:17,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:17,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:17,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:17,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:17,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:21,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:21,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:17:21,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:21,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:21,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:21,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-28 10:17:24,613 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-28 10:17:24,814 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:24,814 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:17:24,821 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:17:24,821 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:17:24 BoogieIcfgContainer [2018-09-28 10:17:24,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:17:24,822 INFO L168 Benchmark]: Toolchain (without parser) took 239551.49 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -23.6 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 256.7 MB). Peak memory consumption was 233.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:17:24,824 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 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. [2018-09-28 10:17:24,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.71 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. [2018-09-28 10:17:24,824 INFO L168 Benchmark]: Boogie Preprocessor took 27.51 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. [2018-09-28 10:17:24,825 INFO L168 Benchmark]: RCFGBuilder took 253.98 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. [2018-09-28 10:17:24,825 INFO L168 Benchmark]: TraceAbstraction took 239216.09 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -23.6 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 235.6 MB). Peak memory consumption was 212.0 MB. Max. memory is 7.1 GB. [2018-09-28 10:17:24,828 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 0.23 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 47.71 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 27.51 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 253.98 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 239216.09 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -23.6 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 235.6 MB). Peak memory consumption was 212.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 16). 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 163 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 239.1s OverallTime, 81 OverallIterations, 81 TraceHistogramMax, 19.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13221 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341280 ImplicationChecksByTransitivity, 199.5s 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, 3.8s SatisfiabilityAnalysisTime, 204.3s 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/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-17-24-846.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-17-24-846.csv Completed graceful shutdown