java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:31:36,043 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:31:36,045 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:31:36,064 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:31:36,064 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:31:36,066 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:31:36,067 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:31:36,069 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:31:36,071 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:31:36,072 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:31:36,073 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:31:36,098 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 [2018-09-26 21:31:36,126 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:31:36,126 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:31:36,127 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:31:36,127 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:31:36,128 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:31:36,128 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:31:36,128 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:31:36,129 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:31:36,129 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:31:36,129 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:31:36,129 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:31:36,130 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:31:36,130 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:31:36,130 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:31:36,130 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:31:36,130 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:31:36,130 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:31:36,131 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:31:36,131 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:31:36,131 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:31:36,131 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:31:36,132 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:31:36,132 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:31:36,132 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:31:36,132 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:31:36,132 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:31:36,133 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:31:36,133 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:31:36,133 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:31:36,133 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:31:36,182 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:31:36,199 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:31:36,206 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:31:36,208 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:31:36,208 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:31:36,209 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl [2018-09-26 21:31:36,210 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/MonadicInvariant01.bpl' [2018-09-26 21:31:36,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:31:36,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:31:36,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:31:36,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:31:36,264 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:31:36,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:36" (1/1) ... [2018-09-26 21:31:36,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:36" (1/1) ... [2018-09-26 21:31:36,305 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:31:36,305 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:31:36,305 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:31:36,307 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:31:36,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:31:36,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:31:36,309 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:31:36,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:36" (1/1) ... [2018-09-26 21:31:36,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:36" (1/1) ... [2018-09-26 21:31:36,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:36" (1/1) ... [2018-09-26 21:31:36,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:36" (1/1) ... [2018-09-26 21:31:36,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:36" (1/1) ... [2018-09-26 21:31:36,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:36" (1/1) ... [2018-09-26 21:31:36,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:36" (1/1) ... [2018-09-26 21:31:36,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:31:36,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:31:36,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:31:36,335 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:31:36,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:36" (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 [2018-09-26 21:31:36,414 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-26 21:31:36,415 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-26 21:31:36,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-26 21:31:36,574 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:31:36,575 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:31:36 BoogieIcfgContainer [2018-09-26 21:31:36,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:31:36,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:31:36,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:31:36,579 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:31:36,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:31:36" (1/2) ... [2018-09-26 21:31:36,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fdfe40 and model type MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:31:36, skipping insertion in model container [2018-09-26 21:31:36,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:31:36" (2/2) ... [2018-09-26 21:31:36,583 INFO L112 eAbstractionObserver]: Analyzing ICFG MonadicInvariant01.bpl [2018-09-26 21:31:36,593 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:31:36,601 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:31:36,652 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:31:36,653 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:31:36,654 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:31:36,654 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:31:36,654 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:31:36,654 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:31:36,654 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:31:36,655 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:31:36,655 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:31:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 21:31:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:31:36,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:36,678 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:31:36,679 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:36,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-26 21:31:36,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:36,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:36,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:36,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:36,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,842 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:31:36,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-26 21:31:36,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:31:36,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:31:36,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:31:36,863 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-26 21:31:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:36,931 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:31:36,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:31:36,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 21:31:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:36,955 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:31:36,955 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 21:31:36,961 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 [2018-09-26 21:31:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 21:31:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-26 21:31:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:31:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-26 21:31:37,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-26 21:31:37,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:37,059 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-26 21:31:37,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:31:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-26 21:31:37,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:31:37,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:37,060 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-26 21:31:37,060 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:37,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:37,060 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-26 21:31:37,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:37,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:37,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:37,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:37,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:37,154 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 [2018-09-26 21:31:37,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:37,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:37,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:37,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-26 21:31:37,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:31:37,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:31:37,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:31:37,292 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-26 21:31:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:37,370 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:31:37,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:31:37,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-26 21:31:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:37,372 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:31:37,373 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:31:37,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:31:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:31:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:31:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:31:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-26 21:31:37,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-26 21:31:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:37,378 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-26 21:31:37,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:31:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-26 21:31:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:31:37,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:37,379 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-26 21:31:37,379 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:37,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:37,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-26 21:31:37,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:37,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:37,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:37,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:37,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:37,483 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 [2018-09-26 21:31:37,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:37,506 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:37,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:37,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:37,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:37,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-26 21:31:37,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:37,669 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-26 21:31:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:37,882 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:31:37,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:31:37,883 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-26 21:31:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:37,883 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:31:37,883 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:31:37,884 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 [2018-09-26 21:31:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:31:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:31:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:31:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-26 21:31:37,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-26 21:31:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:37,888 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-26 21:31:37,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:37,888 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-26 21:31:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:31:37,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:37,889 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-26 21:31:37,890 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:37,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-26 21:31:37,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:37,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:37,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:37,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:38,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:38,043 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 [2018-09-26 21:31:38,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:38,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:31:38,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:38,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:38,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:38,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-26 21:31:38,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:38,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:38,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:38,200 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-26 21:31:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:38,248 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:31:38,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:31:38,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-26 21:31:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:38,250 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:31:38,251 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:31:38,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:31:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:31:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:31:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-26 21:31:38,255 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-26 21:31:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:38,256 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-26 21:31:38,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:38,256 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-26 21:31:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:31:38,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:38,257 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-26 21:31:38,257 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:38,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:38,257 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-26 21:31:38,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:38,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:38,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:38,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:38,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:38,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:38,437 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:38,445 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:38,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:38,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:38,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:38,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-26 21:31:38,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:31:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:31:38,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:31:38,614 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-26 21:31:38,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:38,771 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:31:38,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:31:38,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-26 21:31:38,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:38,772 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:31:38,773 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:31:38,773 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 [2018-09-26 21:31:38,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:31:38,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:31:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:31:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-26 21:31:38,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-26 21:31:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:38,778 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-26 21:31:38,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:31:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-26 21:31:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:38,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:38,779 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-26 21:31:38,779 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:38,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:38,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-26 21:31:38,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:38,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:38,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:38,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:39,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:39,204 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:39,251 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:31:39,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:39,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:39,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-26 21:31:39,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:31:39,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:31:39,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:31:39,402 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-26 21:31:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:39,504 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:31:39,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:39,505 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-26 21:31:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:39,506 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:31:39,506 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:31:39,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:31:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:31:39,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:31:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:31:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-26 21:31:39,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-26 21:31:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:39,511 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-26 21:31:39,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:31:39,511 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-26 21:31:39,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:39,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:39,512 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-26 21:31:39,512 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:39,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:39,513 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-26 21:31:39,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:39,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:39,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:39,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:39,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:39,639 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 [2018-09-26 21:31:39,649 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:39,664 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:39,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:39,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:39,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-26 21:31:39,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:31:39,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:31:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:31:39,851 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-26 21:31:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:39,904 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:31:39,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:39,905 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-26 21:31:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:39,906 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:31:39,906 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:31:39,907 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 [2018-09-26 21:31:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:31:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-26 21:31:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:31:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-26 21:31:39,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-26 21:31:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:39,913 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-26 21:31:39,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:31:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-26 21:31:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:39,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:39,914 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-26 21:31:39,914 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:39,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-26 21:31:39,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:39,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:39,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:39,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:39,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:40,095 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 [2018-09-26 21:31:40,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:40,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:40,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-26 21:31:40,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:31:40,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:31:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:31:40,372 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-26 21:31:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:40,433 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:31:40,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:40,434 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-26 21:31:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:40,435 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:31:40,435 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:31:40,436 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 [2018-09-26 21:31:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:31:40,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:31:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:31:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-26 21:31:40,441 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-26 21:31:40,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:40,441 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-26 21:31:40,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:31:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-26 21:31:40,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:31:40,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:40,442 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-26 21:31:40,442 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:40,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:40,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-26 21:31:40,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:40,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:40,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:40,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:40,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:40,674 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 [2018-09-26 21:31:40,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:40,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:40,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:40,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:40,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-26 21:31:40,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:31:40,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:31:40,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:31:40,911 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-26 21:31:40,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:40,996 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:31:40,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:31:40,997 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-26 21:31:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:40,998 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:31:40,999 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:31:41,000 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 [2018-09-26 21:31:41,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:31:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:31:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-26 21:31:41,004 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-26 21:31:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:41,004 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-26 21:31:41,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:31:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-26 21:31:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:31:41,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:41,006 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-26 21:31:41,006 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:41,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-26 21:31:41,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:41,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:41,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:41,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:41,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:41,200 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 [2018-09-26 21:31:41,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:41,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-26 21:31:41,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:41,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:41,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:41,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-26 21:31:41,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:31:41,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:31:41,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:31:41,518 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-26 21:31:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:41,804 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:31:41,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:31:41,805 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-26 21:31:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:41,806 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:31:41,806 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:31:41,806 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 [2018-09-26 21:31:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:31:41,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-26 21:31:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-26 21:31:41,811 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-26 21:31:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:41,811 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-26 21:31:41,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:31:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-26 21:31:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:31:41,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:41,813 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-26 21:31:41,813 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:41,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:41,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-26 21:31:41,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:41,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:41,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:41,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:42,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:42,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:42,091 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:42,100 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:42,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:42,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:42,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:42,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-26 21:31:42,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:31:42,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:31:42,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:31:42,377 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-26 21:31:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:42,735 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:31:42,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:31:42,735 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-26 21:31:42,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:42,736 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:31:42,736 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:31:42,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:31:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:31:42,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:31:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-26 21:31:42,743 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-26 21:31:42,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:42,743 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-26 21:31:42,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:31:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-26 21:31:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:31:42,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:42,744 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-26 21:31:42,744 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:42,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:42,745 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-26 21:31:42,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:42,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:42,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:42,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:42,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:43,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:43,001 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 [2018-09-26 21:31:43,009 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:43,024 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:31:43,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:43,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:43,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:43,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-26 21:31:43,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:31:43,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:31:43,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:31:43,557 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-26 21:31:43,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:43,656 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:31:43,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:31:43,656 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-26 21:31:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:43,658 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:31:43,658 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:31:43,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:31:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:31:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 21:31:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-26 21:31:43,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-26 21:31:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:43,664 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-26 21:31:43,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:31:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-26 21:31:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:31:43,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:43,665 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-26 21:31:43,666 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:43,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-26 21:31:43,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:43,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:43,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:43,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:43,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:43,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:43,968 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 [2018-09-26 21:31:43,983 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:44,021 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:31:44,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:44,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:44,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:44,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-26 21:31:44,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:31:44,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:31:44,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:31:44,358 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-26 21:31:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:44,430 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:31:44,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:31:44,430 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-26 21:31:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:44,431 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:31:44,431 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:31:44,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:31:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:31:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-26 21:31:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-26 21:31:44,438 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-26 21:31:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:44,438 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-26 21:31:44,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:31:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-26 21:31:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:31:44,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:44,439 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-26 21:31:44,440 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:44,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:44,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-26 21:31:44,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:44,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:44,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:44,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:44,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:44,694 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 [2018-09-26 21:31:44,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:44,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:45,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:45,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-26 21:31:45,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:31:45,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:31:45,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:31:45,351 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-26 21:31:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:45,443 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:31:45,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:31:45,443 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-26 21:31:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:45,444 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:31:45,444 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:31:45,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:31:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:31:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:31:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:31:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-26 21:31:45,449 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-26 21:31:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:45,449 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-26 21:31:45,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:31:45,449 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-26 21:31:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:31:45,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:45,450 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-26 21:31:45,450 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:45,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:45,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-26 21:31:45,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:45,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:45,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:45,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:45,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:45,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:45,686 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 [2018-09-26 21:31:45,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:45,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:45,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:45,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:46,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:46,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-26 21:31:46,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:31:46,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:31:46,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:31:46,076 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-26 21:31:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:46,197 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:31:46,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:31:46,198 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-26 21:31:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:46,199 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:46,199 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:31:46,200 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 [2018-09-26 21:31:46,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:31:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-26 21:31:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:31:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-26 21:31:46,204 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-26 21:31:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:46,204 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-26 21:31:46,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:31:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-26 21:31:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:31:46,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:46,205 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-26 21:31:46,206 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:46,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:46,206 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-26 21:31:46,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:46,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:46,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:46,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:46,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:46,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:46,470 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 [2018-09-26 21:31:46,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:46,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:31:46,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:46,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:47,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:47,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-26 21:31:47,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:31:47,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:31:47,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:31:47,149 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-26 21:31:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:47,267 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:31:47,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:31:47,268 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-26 21:31:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:47,269 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:47,269 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:31:47,271 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 [2018-09-26 21:31:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:31:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:31:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:31:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-26 21:31:47,275 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-26 21:31:47,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:47,275 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-26 21:31:47,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:31:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-26 21:31:47,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:31:47,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:47,277 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-26 21:31:47,277 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:47,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:47,277 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-26 21:31:47,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:47,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:47,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:47,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:47,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:47,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:47,662 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 [2018-09-26 21:31:47,670 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:47,682 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:47,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:47,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:48,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:48,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-26 21:31:48,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:31:48,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:31:48,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:31:48,213 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-26 21:31:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:48,302 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:31:48,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:31:48,302 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-26 21:31:48,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:48,303 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:48,303 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:31:48,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:31:48,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:31:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-26 21:31:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:31:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-26 21:31:48,310 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-26 21:31:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:48,310 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-26 21:31:48,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:31:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-26 21:31:48,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:31:48,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:48,311 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-26 21:31:48,311 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:48,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:48,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-26 21:31:48,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:48,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:48,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:48,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:48,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:48,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:48,622 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 [2018-09-26 21:31:48,630 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:48,650 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:31:48,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:48,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:49,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:49,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-26 21:31:49,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:31:49,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:31:49,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:31:49,219 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-26 21:31:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:49,488 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:31:49,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:31:49,489 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-26 21:31:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:49,490 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:49,490 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:31:49,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:31:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:31:49,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:31:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:31:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-26 21:31:49,497 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-26 21:31:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:49,497 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-26 21:31:49,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:31:49,497 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-26 21:31:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:31:49,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:49,498 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-26 21:31:49,498 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:49,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:49,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-26 21:31:49,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:49,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:49,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:49,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:49,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:50,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:50,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:50,119 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:50,140 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:31:50,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:50,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:51,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:51,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-26 21:31:51,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:31:51,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:31:51,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:31:51,005 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-26 21:31:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:51,095 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:31:51,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:31:51,095 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-26 21:31:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:51,096 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:51,097 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:31:51,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:31:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:31:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-26 21:31:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:31:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-26 21:31:51,102 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-26 21:31:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:51,102 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-26 21:31:51,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:31:51,102 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-26 21:31:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:31:51,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:51,103 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-26 21:31:51,103 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:51,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:51,103 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-26 21:31:51,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:51,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:51,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:51,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:51,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:51,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:51,378 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 [2018-09-26 21:31:51,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:51,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:52,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:52,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-26 21:31:52,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:31:52,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:31:52,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:31:52,214 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-26 21:31:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:52,388 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:31:52,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:31:52,389 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-26 21:31:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:52,389 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:52,390 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:31:52,391 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 [2018-09-26 21:31:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:31:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-26 21:31:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:31:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-26 21:31:52,396 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-26 21:31:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:52,396 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-26 21:31:52,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:31:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-26 21:31:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:31:52,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:52,397 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-26 21:31:52,397 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:52,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:52,398 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-26 21:31:52,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:52,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:52,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:52,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:52,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:53,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:53,193 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 [2018-09-26 21:31:53,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:53,216 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:53,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:53,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:53,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:53,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-26 21:31:53,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:31:53,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:31:53,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:31:53,642 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-26 21:31:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:53,756 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:31:53,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:31:53,756 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-26 21:31:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:53,757 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:53,757 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:31:53,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:31:53,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:31:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:31:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:31:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-26 21:31:53,765 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-26 21:31:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:53,765 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-26 21:31:53,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:31:53,766 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-26 21:31:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-26 21:31:53,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:53,768 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-26 21:31:53,769 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:53,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-26 21:31:53,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:53,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:53,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:53,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:53,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:54,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:54,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:54,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:54,659 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-26 21:31:54,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:54,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:55,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:55,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-26 21:31:55,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:31:55,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:31:55,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:31:55,569 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-26 21:31:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:55,717 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:31:55,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:31:55,719 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-26 21:31:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:55,720 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:55,720 INFO L226 Difference]: Without dead ends: 48 [2018-09-26 21:31:55,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:31:55,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-26 21:31:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-26 21:31:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-26 21:31:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-26 21:31:55,725 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-26 21:31:55,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:55,725 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-26 21:31:55,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:31:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-26 21:31:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:31:55,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:55,726 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-26 21:31:55,727 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:55,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:55,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-26 21:31:55,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:55,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:55,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:55,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:55,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:56,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:56,750 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 [2018-09-26 21:31:56,758 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:56,774 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:56,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:56,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:57,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:57,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-26 21:31:57,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:31:57,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:31:57,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:31:57,496 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-26 21:31:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:57,595 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:31:57,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:31:57,595 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-26 21:31:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:57,596 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:31:57,596 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:31:57,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:31:57,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:31:57,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-26 21:31:57,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:31:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-26 21:31:57,602 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-26 21:31:57,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:57,602 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-26 21:31:57,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:31:57,602 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-26 21:31:57,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-26 21:31:57,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:57,603 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-26 21:31:57,603 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:57,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:57,603 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-26 21:31:57,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:57,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:57,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:57,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:57,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:58,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:58,166 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 [2018-09-26 21:31:58,173 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:58,227 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-26 21:31:58,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:58,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:58,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:58,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-26 21:31:58,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:31:58,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:31:58,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:31:58,812 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-26 21:31:58,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:58,941 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:31:58,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:31:58,942 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-26 21:31:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:58,943 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:31:58,943 INFO L226 Difference]: Without dead ends: 52 [2018-09-26 21:31:58,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:31:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-26 21:31:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-26 21:31:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:31:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-26 21:31:58,948 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-26 21:31:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:58,949 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-26 21:31:58,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:31:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-26 21:31:58,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-26 21:31:58,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:58,950 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-26 21:31:58,950 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:58,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:58,950 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-26 21:31:58,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:58,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:58,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:58,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:58,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:59,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:59,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:59,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:59,450 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:31:59,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:59,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:59,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:59,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-26 21:31:59,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:31:59,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:31:59,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:31:59,902 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-26 21:32:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:00,053 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:32:00,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:32:00,054 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-26 21:32:00,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:00,055 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:32:00,055 INFO L226 Difference]: Without dead ends: 54 [2018-09-26 21:32:00,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:32:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-26 21:32:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-26 21:32:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:32:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-26 21:32:00,060 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-26 21:32:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:00,060 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-26 21:32:00,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:32:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-26 21:32:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:32:00,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:00,061 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-26 21:32:00,061 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:00,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-26 21:32:00,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:00,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:00,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:00,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:00,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:00,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:00,423 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 [2018-09-26 21:32:00,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:00,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:00,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:00,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-26 21:32:00,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:32:00,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:32:00,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:32:00,911 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-26 21:32:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:01,039 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:32:01,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:32:01,040 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-26 21:32:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:01,041 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:32:01,041 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:32:01,043 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 [2018-09-26 21:32:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:32:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:32:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:32:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-26 21:32:01,047 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-26 21:32:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:01,047 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-26 21:32:01,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:32:01,047 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-26 21:32:01,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-26 21:32:01,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:01,048 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-26 21:32:01,048 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:01,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:01,048 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-26 21:32:01,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:01,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:01,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:01,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:01,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:01,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:01,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:01,563 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:01,580 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:01,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:01,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:02,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:02,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-26 21:32:02,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:32:02,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:32:02,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:32:02,338 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-26 21:32:02,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:02,460 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:32:02,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:32:02,460 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-26 21:32:02,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:02,461 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:32:02,461 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:32:02,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:32:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:32:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-26 21:32:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-26 21:32:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-26 21:32:02,466 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-26 21:32:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:02,466 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-26 21:32:02,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:32:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-26 21:32:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-26 21:32:02,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:02,467 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-26 21:32:02,468 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:02,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:02,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-26 21:32:02,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:02,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:02,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:02,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:02,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:02,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:02,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:02,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:02,977 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:32:02,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:02,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:03,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:03,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-26 21:32:03,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:32:03,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:32:03,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:32:03,776 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-26 21:32:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:03,885 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:32:03,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:32:03,885 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-26 21:32:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:03,886 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:32:03,886 INFO L226 Difference]: Without dead ends: 60 [2018-09-26 21:32:03,887 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 [2018-09-26 21:32:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-26 21:32:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-26 21:32:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:32:03,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-26 21:32:03,891 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-26 21:32:03,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:03,891 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-26 21:32:03,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:32:03,891 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-26 21:32:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-26 21:32:03,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:03,892 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-26 21:32:03,892 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:03,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:03,892 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-26 21:32:03,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:03,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:03,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:03,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:03,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:04,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:04,373 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 [2018-09-26 21:32:04,389 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:04,430 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:04,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:04,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:05,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:05,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-26 21:32:05,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:32:05,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:32:05,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:32:05,500 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-26 21:32:05,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:05,679 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:32:05,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:32:05,680 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-26 21:32:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:05,681 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:32:05,681 INFO L226 Difference]: Without dead ends: 62 [2018-09-26 21:32:05,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:32:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-26 21:32:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-26 21:32:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-26 21:32:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-26 21:32:05,686 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-26 21:32:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:05,686 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-26 21:32:05,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:32:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-26 21:32:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-26 21:32:05,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:05,689 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-26 21:32:05,689 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:05,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:05,690 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-26 21:32:05,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:05,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:05,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:05,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:05,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:06,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:06,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:06,196 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:06,225 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-26 21:32:06,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:06,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:06,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:06,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-26 21:32:06,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:32:06,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:32:06,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:32:06,815 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-26 21:32:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:06,960 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:32:06,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:32:06,961 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-26 21:32:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:06,962 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:32:06,962 INFO L226 Difference]: Without dead ends: 64 [2018-09-26 21:32:06,964 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 [2018-09-26 21:32:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-26 21:32:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-26 21:32:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-26 21:32:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-26 21:32:06,966 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-26 21:32:06,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:06,966 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-26 21:32:06,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:32:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-26 21:32:06,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-26 21:32:06,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:06,967 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-26 21:32:06,967 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:06,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:06,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-26 21:32:06,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:06,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:06,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:06,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:06,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:07,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:07,743 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 [2018-09-26 21:32:07,751 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:07,786 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:32:07,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:07,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:08,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:08,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-26 21:32:08,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:32:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:32:08,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:32:08,770 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-26 21:32:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:08,890 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-26 21:32:08,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:32:08,890 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-26 21:32:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:08,891 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:32:08,891 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:32:08,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:32:08,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:32:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-26 21:32:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:32:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-26 21:32:08,896 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-26 21:32:08,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:08,896 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-26 21:32:08,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:32:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-26 21:32:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-26 21:32:08,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:08,897 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-26 21:32:08,897 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:08,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-26 21:32:08,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:08,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:08,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:08,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:08,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:09,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:09,488 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 [2018-09-26 21:32:09,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:09,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:10,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:10,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-26 21:32:10,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:32:10,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:32:10,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:32:10,176 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-26 21:32:10,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:10,355 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:32:10,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:32:10,355 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-26 21:32:10,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:10,356 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:32:10,356 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:32:10,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:32:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:32:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-26 21:32:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-26 21:32:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-26 21:32:10,361 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-26 21:32:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:10,362 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-26 21:32:10,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:32:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-26 21:32:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-26 21:32:10,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:10,363 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-26 21:32:10,363 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:10,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-26 21:32:10,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:10,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:10,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:10,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:10,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:11,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:11,553 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 [2018-09-26 21:32:11,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:11,580 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:11,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:11,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:12,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:12,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-26 21:32:12,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:32:12,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:32:12,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:32:12,314 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-26 21:32:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:12,443 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-26 21:32:12,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:32:12,443 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-26 21:32:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:12,444 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:32:12,444 INFO L226 Difference]: Without dead ends: 70 [2018-09-26 21:32:12,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:32:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-26 21:32:12,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-26 21:32:12,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:32:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-26 21:32:12,450 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-26 21:32:12,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:12,450 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-26 21:32:12,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:32:12,450 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-26 21:32:12,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-26 21:32:12,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:12,451 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-26 21:32:12,451 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:12,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-26 21:32:12,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:12,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:12,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:12,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:12,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:13,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:13,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:13,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:13,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-26 21:32:13,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:13,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:14,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:14,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-26 21:32:14,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:32:14,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:32:14,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:32:14,244 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-26 21:32:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:14,438 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:32:14,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:32:14,438 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-26 21:32:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:14,439 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:32:14,440 INFO L226 Difference]: Without dead ends: 72 [2018-09-26 21:32:14,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:32:14,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-26 21:32:14,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-26 21:32:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-26 21:32:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-26 21:32:14,444 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-26 21:32:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:14,444 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-26 21:32:14,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:32:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-26 21:32:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-26 21:32:14,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:14,445 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-26 21:32:14,445 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:14,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:14,445 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-26 21:32:14,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:14,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:14,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:14,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:14,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:15,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:15,059 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 [2018-09-26 21:32:15,066 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:15,086 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:15,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:15,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:15,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:15,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-26 21:32:15,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:32:15,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:32:15,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:32:15,900 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-26 21:32:16,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:16,074 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-26 21:32:16,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:32:16,074 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-26 21:32:16,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:16,075 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:32:16,075 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:32:16,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:32:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:32:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-26 21:32:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-26 21:32:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-26 21:32:16,081 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-26 21:32:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:16,082 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-26 21:32:16,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:32:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-26 21:32:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:32:16,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:16,082 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-26 21:32:16,083 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:16,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:16,083 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-26 21:32:16,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:16,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:16,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:16,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:16,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:16,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:16,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:16,718 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:16,754 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-26 21:32:16,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:16,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:17,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:17,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-26 21:32:17,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:32:17,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:32:17,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:32:17,576 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-26 21:32:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:17,902 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:32:17,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:32:17,902 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-26 21:32:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:17,903 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:32:17,904 INFO L226 Difference]: Without dead ends: 76 [2018-09-26 21:32:17,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:32:17,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-26 21:32:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-26 21:32:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:32:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-26 21:32:17,907 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-26 21:32:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:17,907 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-26 21:32:17,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:32:17,908 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-26 21:32:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-26 21:32:17,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:17,908 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-26 21:32:17,908 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:17,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:17,909 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-26 21:32:17,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:17,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:17,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:17,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:17,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:19,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:19,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:19,121 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:19,160 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:32:19,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:19,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:20,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:20,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-26 21:32:20,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:32:20,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:32:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:32:20,005 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-26 21:32:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:20,184 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-26 21:32:20,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:32:20,184 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-26 21:32:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:20,185 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:32:20,185 INFO L226 Difference]: Without dead ends: 78 [2018-09-26 21:32:20,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:32:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-26 21:32:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-26 21:32:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-26 21:32:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-26 21:32:20,189 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-26 21:32:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:20,189 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-26 21:32:20,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:32:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-26 21:32:20,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-26 21:32:20,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:20,190 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-26 21:32:20,190 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:20,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-26 21:32:20,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:20,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:20,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:20,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:20,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:21,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:21,385 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 [2018-09-26 21:32:21,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:21,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:22,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:22,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-26 21:32:22,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:32:22,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:32:22,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:32:22,298 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-26 21:32:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:22,455 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:32:22,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:32:22,455 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-26 21:32:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:22,456 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:32:22,456 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:32:22,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:32:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:32:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-26 21:32:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:32:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-26 21:32:22,462 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-26 21:32:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:22,462 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-26 21:32:22,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:32:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-26 21:32:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-26 21:32:22,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:22,462 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-26 21:32:22,463 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:22,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:22,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-26 21:32:22,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:22,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:22,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:22,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:22,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:23,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:23,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:23,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:23,392 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:23,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:23,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:24,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:24,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-26 21:32:24,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:32:24,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:32:24,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:32:24,621 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-26 21:32:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:24,818 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-26 21:32:24,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:32:24,819 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-26 21:32:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:24,820 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:32:24,820 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:32:24,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:32:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:32:24,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-26 21:32:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-26 21:32:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-26 21:32:24,825 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-26 21:32:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:24,825 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-26 21:32:24,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:32:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-26 21:32:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-26 21:32:24,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:24,826 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-26 21:32:24,826 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:24,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:24,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-26 21:32:24,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:24,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:24,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:24,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:24,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:25,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:25,706 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 [2018-09-26 21:32:25,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:25,752 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-26 21:32:25,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:25,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:26,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:26,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-26 21:32:26,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:32:26,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:32:26,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:32:26,759 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-26 21:32:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:26,934 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-26 21:32:26,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:32:26,934 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-26 21:32:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:26,935 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:32:26,935 INFO L226 Difference]: Without dead ends: 84 [2018-09-26 21:32:26,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:32:26,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-26 21:32:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-26 21:32:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-26 21:32:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-26 21:32:26,940 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-26 21:32:26,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:26,941 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-26 21:32:26,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:32:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-26 21:32:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:32:26,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:26,942 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-26 21:32:26,942 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:26,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:26,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-26 21:32:26,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:26,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:26,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:26,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:26,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:27,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:27,825 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 [2018-09-26 21:32:27,832 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:27,858 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:27,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:27,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:29,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:29,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-26 21:32:29,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:32:29,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:32:29,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:32:29,030 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-26 21:32:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:29,229 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-26 21:32:29,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:32:29,230 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-26 21:32:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:29,231 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:32:29,231 INFO L226 Difference]: Without dead ends: 86 [2018-09-26 21:32:29,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:32:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-26 21:32:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-26 21:32:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:32:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-26 21:32:29,235 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-26 21:32:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:29,237 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-26 21:32:29,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:32:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-26 21:32:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-26 21:32:29,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:29,238 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-26 21:32:29,238 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:29,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:29,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-26 21:32:29,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:29,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:29,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:29,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:29,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:30,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:30,155 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 [2018-09-26 21:32:30,163 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:30,204 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-26 21:32:30,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:30,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:31,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:31,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-26 21:32:31,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:32:31,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:32:31,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:32:31,317 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-26 21:32:31,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:31,501 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-26 21:32:31,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:32:31,502 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-26 21:32:31,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:31,503 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:32:31,503 INFO L226 Difference]: Without dead ends: 88 [2018-09-26 21:32:31,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:32:31,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-26 21:32:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-26 21:32:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-26 21:32:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-26 21:32:31,508 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-26 21:32:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:31,508 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-26 21:32:31,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:32:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-26 21:32:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-26 21:32:31,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:31,509 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-26 21:32:31,510 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:31,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:31,510 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-26 21:32:31,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:31,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:31,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:31,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:31,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:32,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:32,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:32,523 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:32,563 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:32:32,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:32,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:33,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:33,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-26 21:32:33,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:32:33,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:32:33,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:32:33,800 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-26 21:32:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:34,043 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-26 21:32:34,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:32:34,043 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-26 21:32:34,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:34,044 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:32:34,044 INFO L226 Difference]: Without dead ends: 90 [2018-09-26 21:32:34,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:32:34,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-26 21:32:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-26 21:32:34,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-26 21:32:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-26 21:32:34,048 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-26 21:32:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:34,048 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-26 21:32:34,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:32:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-26 21:32:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-26 21:32:34,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:34,049 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-26 21:32:34,049 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:34,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:34,049 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-26 21:32:34,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:34,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:34,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:34,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:34,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:35,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:35,956 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 [2018-09-26 21:32:35,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:35,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:37,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:37,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-26 21:32:37,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:32:37,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:32:37,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:32:37,232 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-26 21:32:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:37,403 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-26 21:32:37,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:32:37,404 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-26 21:32:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:37,405 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:32:37,405 INFO L226 Difference]: Without dead ends: 92 [2018-09-26 21:32:37,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:32:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-26 21:32:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-26 21:32:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-26 21:32:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-26 21:32:37,409 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-26 21:32:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:37,410 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-26 21:32:37,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:32:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-26 21:32:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-26 21:32:37,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:37,411 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-26 21:32:37,411 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:37,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:37,411 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-26 21:32:37,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:37,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:37,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:37,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:37,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:38,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:38,450 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 [2018-09-26 21:32:38,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:38,485 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:38,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:38,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:39,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:39,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-26 21:32:39,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:32:39,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:32:39,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:32:39,983 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-26 21:32:40,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:40,163 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-26 21:32:40,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:32:40,163 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-26 21:32:40,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:40,164 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:32:40,165 INFO L226 Difference]: Without dead ends: 94 [2018-09-26 21:32:40,165 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 [2018-09-26 21:32:40,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-26 21:32:40,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-26 21:32:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-26 21:32:40,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-26 21:32:40,170 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-26 21:32:40,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:40,170 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-26 21:32:40,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:32:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-26 21:32:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-26 21:32:40,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:40,171 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-26 21:32:40,172 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:40,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-26 21:32:40,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:40,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:40,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:40,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:40,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:41,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:41,297 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 [2018-09-26 21:32:41,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:41,418 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-26 21:32:41,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:41,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:42,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:42,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-26 21:32:42,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:32:42,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:32:42,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:32:42,814 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-26 21:32:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:43,014 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-26 21:32:43,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:32:43,015 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-26 21:32:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:43,016 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:32:43,016 INFO L226 Difference]: Without dead ends: 96 [2018-09-26 21:32:43,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:32:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-26 21:32:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-26 21:32:43,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-26 21:32:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-26 21:32:43,021 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-26 21:32:43,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:43,022 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-26 21:32:43,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:32:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-26 21:32:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-26 21:32:43,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:43,023 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-26 21:32:43,023 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:43,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:43,023 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-26 21:32:43,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:43,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:43,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:43,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:43,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:44,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:44,756 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 [2018-09-26 21:32:44,765 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:44,794 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:44,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:44,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:46,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:46,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-26 21:32:46,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:32:46,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:32:46,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:32:46,184 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-26 21:32:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:46,393 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-26 21:32:46,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:32:46,394 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-26 21:32:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:46,395 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:32:46,395 INFO L226 Difference]: Without dead ends: 98 [2018-09-26 21:32:46,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:32:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-26 21:32:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-26 21:32:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-26 21:32:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-26 21:32:46,401 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-26 21:32:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:46,401 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-26 21:32:46,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:32:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-26 21:32:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-26 21:32:46,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:46,402 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-26 21:32:46,402 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:46,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:46,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-26 21:32:46,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:46,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:46,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:46,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:46,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:47,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:47,502 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 [2018-09-26 21:32:47,509 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:47,558 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-26 21:32:47,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:47,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:49,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:49,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-26 21:32:49,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:32:49,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:32:49,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:32:49,088 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-26 21:32:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:49,308 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-26 21:32:49,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:32:49,308 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-26 21:32:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:49,309 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:32:49,309 INFO L226 Difference]: Without dead ends: 100 [2018-09-26 21:32:49,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:32:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-26 21:32:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-26 21:32:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:32:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-26 21:32:49,314 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-26 21:32:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:49,314 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-26 21:32:49,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:32:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-26 21:32:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-26 21:32:49,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:49,315 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-26 21:32:49,315 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:49,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:49,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-26 21:32:49,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:49,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:49,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:49,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:49,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:50,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:50,594 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 [2018-09-26 21:32:50,601 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:50,652 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:32:50,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:50,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:52,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:52,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-26 21:32:52,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:32:52,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:32:52,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:32:52,069 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-26 21:32:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:52,313 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-26 21:32:52,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:32:52,313 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-26 21:32:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:52,314 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:32:52,314 INFO L226 Difference]: Without dead ends: 102 [2018-09-26 21:32:52,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:32:52,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-26 21:32:52,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-26 21:32:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-26 21:32:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-26 21:32:52,320 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-26 21:32:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:52,320 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-26 21:32:52,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:32:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-26 21:32:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-26 21:32:52,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:52,321 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-26 21:32:52,321 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:52,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:52,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-26 21:32:52,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:52,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:52,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:52,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:52,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:53,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:53,825 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 [2018-09-26 21:32:53,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:53,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:56,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:56,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-26 21:32:56,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:32:56,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:32:56,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:32:56,193 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-26 21:32:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:56,473 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-26 21:32:56,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:32:56,473 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-26 21:32:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:56,475 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:32:56,475 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 21:32:56,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:32:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 21:32:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-26 21:32:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-26 21:32:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-26 21:32:56,481 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-26 21:32:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:56,481 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-26 21:32:56,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:32:56,482 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-26 21:32:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-26 21:32:56,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:56,482 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-26 21:32:56,483 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:56,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:56,483 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-26 21:32:56,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:56,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:56,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:56,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:56,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:57,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:57,669 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 [2018-09-26 21:32:57,678 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:57,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:57,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:57,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:59,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:59,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-26 21:32:59,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:32:59,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:32:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:32:59,210 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-26 21:33:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:01,260 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-26 21:33:01,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:33:01,260 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-26 21:33:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:01,261 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:33:01,261 INFO L226 Difference]: Without dead ends: 106 [2018-09-26 21:33:01,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:33:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-26 21:33:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-26 21:33:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-26 21:33:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-26 21:33:01,267 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-26 21:33:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:01,267 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-26 21:33:01,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:33:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-26 21:33:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-26 21:33:01,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:01,268 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-26 21:33:01,268 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:01,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:01,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-26 21:33:01,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:01,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:01,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:01,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:01,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:02,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:02,824 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 [2018-09-26 21:33:02,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:02,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-26 21:33:02,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:02,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:04,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:04,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-26 21:33:04,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:33:04,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:33:04,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:33:04,454 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-26 21:33:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:04,700 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-26 21:33:04,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:33:04,701 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-26 21:33:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:04,701 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:33:04,701 INFO L226 Difference]: Without dead ends: 108 [2018-09-26 21:33:04,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:33:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-26 21:33:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-26 21:33:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-26 21:33:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-26 21:33:04,707 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-26 21:33:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:04,707 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-26 21:33:04,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:33:04,708 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-26 21:33:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-26 21:33:04,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:04,708 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-26 21:33:04,709 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:04,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:04,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-26 21:33:04,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:04,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:04,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:04,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:04,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:06,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:06,143 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 [2018-09-26 21:33:06,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:06,202 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:06,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:06,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:08,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:08,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-26 21:33:08,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:33:08,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:33:08,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:33:08,195 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-26 21:33:08,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:08,398 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-26 21:33:08,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:33:08,398 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-26 21:33:08,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:08,400 INFO L225 Difference]: With dead ends: 111 [2018-09-26 21:33:08,400 INFO L226 Difference]: Without dead ends: 110 [2018-09-26 21:33:08,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:33:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-26 21:33:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-26 21:33:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-26 21:33:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-26 21:33:08,404 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-26 21:33:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:08,404 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-26 21:33:08,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:33:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-26 21:33:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-26 21:33:08,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:08,405 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-26 21:33:08,406 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:08,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-26 21:33:08,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:08,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:08,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:08,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:08,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:09,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:09,696 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 [2018-09-26 21:33:09,707 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:09,868 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-26 21:33:09,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:09,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:11,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:11,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-26 21:33:11,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-26 21:33:11,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-26 21:33:11,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:33:11,602 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-26 21:33:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:11,813 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-26 21:33:11,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:33:11,813 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-26 21:33:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:11,814 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:33:11,815 INFO L226 Difference]: Without dead ends: 112 [2018-09-26 21:33:11,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:33:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-26 21:33:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-26 21:33:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-26 21:33:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-26 21:33:11,820 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-26 21:33:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:11,820 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-26 21:33:11,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-26 21:33:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-26 21:33:11,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-26 21:33:11,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:11,821 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-26 21:33:11,821 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:11,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-26 21:33:11,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:11,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:11,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:11,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:11,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:13,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:13,664 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 [2018-09-26 21:33:13,670 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:13,726 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-26 21:33:13,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:13,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:15,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:15,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-26 21:33:15,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-26 21:33:15,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-26 21:33:15,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:33:15,786 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-26 21:33:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:16,003 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-26 21:33:16,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:33:16,004 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-26 21:33:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:16,005 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:33:16,005 INFO L226 Difference]: Without dead ends: 114 [2018-09-26 21:33:16,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:33:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-26 21:33:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-26 21:33:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-26 21:33:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-26 21:33:16,011 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-26 21:33:16,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:16,012 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-26 21:33:16,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-26 21:33:16,012 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-26 21:33:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-26 21:33:16,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:16,013 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-26 21:33:16,013 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:16,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:16,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-26 21:33:16,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:16,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:16,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:16,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:16,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:17,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:17,806 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 [2018-09-26 21:33:17,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:17,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:19,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:19,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-26 21:33:19,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-26 21:33:19,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-26 21:33:19,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-26 21:33:19,642 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-26 21:33:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:20,154 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-26 21:33:20,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:33:20,154 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-26 21:33:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:20,155 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:33:20,155 INFO L226 Difference]: Without dead ends: 116 [2018-09-26 21:33:20,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-26 21:33:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-26 21:33:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-26 21:33:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-26 21:33:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-26 21:33:20,160 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-26 21:33:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:20,161 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-26 21:33:20,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-26 21:33:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-26 21:33:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-26 21:33:20,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:20,162 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-26 21:33:20,162 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:20,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-26 21:33:20,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:20,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:20,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:20,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:20,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:21,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:21,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:33:21,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:21,762 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:21,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:21,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:23,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:23,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-26 21:33:23,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-26 21:33:23,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-26 21:33:23,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-26 21:33:23,605 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-26 21:33:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:23,900 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-26 21:33:23,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:33:23,901 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-26 21:33:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:23,902 INFO L225 Difference]: With dead ends: 119 [2018-09-26 21:33:23,902 INFO L226 Difference]: Without dead ends: 118 [2018-09-26 21:33:23,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-26 21:33:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-26 21:33:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-26 21:33:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-26 21:33:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-26 21:33:23,907 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-26 21:33:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:23,907 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-26 21:33:23,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-26 21:33:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-26 21:33:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-26 21:33:23,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:23,908 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-26 21:33:23,908 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:23,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:23,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-26 21:33:23,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:23,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:23,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:23,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:23,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:26,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:26,212 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 [2018-09-26 21:33:26,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:26,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-26 21:33:26,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:26,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:28,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:28,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-26 21:33:28,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-26 21:33:28,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-26 21:33:28,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-26 21:33:28,390 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-26 21:33:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:28,641 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-26 21:33:28,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:33:28,641 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-26 21:33:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:28,642 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:33:28,642 INFO L226 Difference]: Without dead ends: 120 [2018-09-26 21:33:28,644 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 [2018-09-26 21:33:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-26 21:33:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-26 21:33:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-26 21:33:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-26 21:33:28,647 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-26 21:33:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:28,647 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-26 21:33:28,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-26 21:33:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-26 21:33:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-26 21:33:28,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:28,648 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-26 21:33:28,648 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:28,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:28,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-26 21:33:28,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:28,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:28,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:28,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:28,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:30,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:30,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:33:30,200 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:30,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:30,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:30,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:32,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:32,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-26 21:33:32,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-26 21:33:32,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-26 21:33:32,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-26 21:33:32,593 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-26 21:33:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:32,872 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-26 21:33:32,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:33:32,873 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-26 21:33:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:32,873 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:33:32,874 INFO L226 Difference]: Without dead ends: 122 [2018-09-26 21:33:32,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-26 21:33:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-26 21:33:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-26 21:33:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-26 21:33:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-26 21:33:32,880 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-26 21:33:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:32,880 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-26 21:33:32,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-26 21:33:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-26 21:33:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-26 21:33:32,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:32,881 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-26 21:33:32,881 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:32,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:32,882 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-26 21:33:32,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:32,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:32,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:32,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:32,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:34,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:34,474 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 [2018-09-26 21:33:34,493 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:34,563 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-26 21:33:34,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:34,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:36,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:36,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-26 21:33:36,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-26 21:33:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-26 21:33:36,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-26 21:33:36,955 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-26 21:33:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:37,214 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-26 21:33:37,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:33:37,215 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-26 21:33:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:37,215 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:33:37,215 INFO L226 Difference]: Without dead ends: 124 [2018-09-26 21:33:37,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-26 21:33:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-26 21:33:37,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-26 21:33:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-26 21:33:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-26 21:33:37,220 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-26 21:33:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:37,220 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-26 21:33:37,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-26 21:33:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-26 21:33:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-26 21:33:37,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:37,221 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-26 21:33:37,222 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:37,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:37,222 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-26 21:33:37,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:37,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:37,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:37,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:37,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:39,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:39,043 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 [2018-09-26 21:33:39,052 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:39,114 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-26 21:33:39,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:39,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:41,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:41,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-26 21:33:41,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-26 21:33:41,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-26 21:33:41,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-26 21:33:41,421 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-26 21:33:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:41,670 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-26 21:33:41,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:33:41,670 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-26 21:33:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:41,672 INFO L225 Difference]: With dead ends: 127 [2018-09-26 21:33:41,672 INFO L226 Difference]: Without dead ends: 126 [2018-09-26 21:33:41,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-26 21:33:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-26 21:33:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-26 21:33:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-26 21:33:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-26 21:33:41,677 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-26 21:33:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:41,677 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-26 21:33:41,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-26 21:33:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-26 21:33:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-26 21:33:41,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:41,678 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-26 21:33:41,678 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:41,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:41,678 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-26 21:33:41,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:41,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:41,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:41,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:41,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:43,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:43,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:33:43,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:43,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:45,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:45,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-26 21:33:45,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-26 21:33:45,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-26 21:33:45,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-26 21:33:45,507 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-26 21:33:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:45,897 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-26 21:33:45,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:33:45,897 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-26 21:33:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:45,898 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:33:45,898 INFO L226 Difference]: Without dead ends: 128 [2018-09-26 21:33:45,898 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 [2018-09-26 21:33:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-26 21:33:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-26 21:33:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-26 21:33:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-26 21:33:45,901 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-26 21:33:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:45,902 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-26 21:33:45,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-26 21:33:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-26 21:33:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-26 21:33:45,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:45,902 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-26 21:33:45,903 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:45,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:45,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-26 21:33:45,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:45,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:45,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:45,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:45,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:48,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:48,499 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 [2018-09-26 21:33:48,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:48,541 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:48,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:48,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:50,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:50,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-26 21:33:50,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-26 21:33:50,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-26 21:33:50,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-26 21:33:50,754 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-26 21:33:51,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:51,131 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-26 21:33:51,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:33:51,131 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-26 21:33:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:51,132 INFO L225 Difference]: With dead ends: 131 [2018-09-26 21:33:51,132 INFO L226 Difference]: Without dead ends: 130 [2018-09-26 21:33:51,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-26 21:33:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-26 21:33:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-26 21:33:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-26 21:33:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-26 21:33:51,137 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-26 21:33:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:51,137 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-26 21:33:51,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-26 21:33:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-26 21:33:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-26 21:33:51,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:51,138 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-26 21:33:51,138 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:51,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:51,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-26 21:33:51,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:51,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:51,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:51,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:51,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:53,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:53,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:33:53,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:53,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-26 21:33:53,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:53,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:55,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:55,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-26 21:33:55,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-26 21:33:55,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-26 21:33:55,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-26 21:33:55,524 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-26 21:33:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:55,861 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-26 21:33:55,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:33:55,861 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-26 21:33:55,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:55,862 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:33:55,862 INFO L226 Difference]: Without dead ends: 132 [2018-09-26 21:33:55,864 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 [2018-09-26 21:33:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-26 21:33:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-26 21:33:55,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-26 21:33:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-26 21:33:55,869 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-26 21:33:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:55,869 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-26 21:33:55,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-26 21:33:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-26 21:33:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-26 21:33:55,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:55,870 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-26 21:33:55,871 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:55,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-26 21:33:55,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:55,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:55,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:55,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:55,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:57,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:57,849 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 [2018-09-26 21:33:57,863 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:57,899 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:57,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:57,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:00,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:00,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-26 21:34:00,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-26 21:34:00,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-26 21:34:00,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-26 21:34:00,226 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-26 21:34:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:00,485 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-26 21:34:00,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:34:00,486 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-26 21:34:00,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:00,487 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:34:00,487 INFO L226 Difference]: Without dead ends: 134 [2018-09-26 21:34:00,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-26 21:34:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-26 21:34:00,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-26 21:34:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-26 21:34:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-26 21:34:00,494 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-26 21:34:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:00,494 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-26 21:34:00,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-26 21:34:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-26 21:34:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-26 21:34:00,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:00,495 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-26 21:34:00,495 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:00,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-26 21:34:00,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:00,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:00,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:00,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:00,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:03,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:03,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:34:03,573 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:03,654 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-26 21:34:03,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:03,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:07,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:07,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-26 21:34:07,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-26 21:34:07,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-26 21:34:07,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-26 21:34:07,061 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-26 21:34:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:07,410 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-26 21:34:07,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:34:07,411 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-26 21:34:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:07,412 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:34:07,412 INFO L226 Difference]: Without dead ends: 136 [2018-09-26 21:34:07,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-26 21:34:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-26 21:34:07,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-26 21:34:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-26 21:34:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-26 21:34:07,419 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-26 21:34:07,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:07,419 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-26 21:34:07,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-26 21:34:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-26 21:34:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-26 21:34:07,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:07,420 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-26 21:34:07,420 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:07,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-26 21:34:07,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:07,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:07,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:07,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:09,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:09,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:34:09,981 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:10,055 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-26 21:34:10,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:10,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:12,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:12,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-26 21:34:12,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-26 21:34:12,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-26 21:34:12,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-26 21:34:12,948 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-26 21:34:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:13,263 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-26 21:34:13,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:34:13,264 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-26 21:34:13,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:13,265 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:34:13,265 INFO L226 Difference]: Without dead ends: 138 [2018-09-26 21:34:13,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-26 21:34:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-26 21:34:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-26 21:34:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-26 21:34:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-26 21:34:13,269 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-26 21:34:13,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:13,269 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-26 21:34:13,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-26 21:34:13,269 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-26 21:34:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-26 21:34:13,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:13,270 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-26 21:34:13,270 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:13,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:13,270 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-26 21:34:13,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:13,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:13,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:13,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:13,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:15,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:15,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:34:15,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:15,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:18,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-26 21:34:18,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-26 21:34:18,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-26 21:34:18,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-26 21:34:18,198 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-26 21:34:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:18,503 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-26 21:34:18,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:34:18,503 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-26 21:34:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:18,504 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:34:18,505 INFO L226 Difference]: Without dead ends: 140 [2018-09-26 21:34:18,506 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 [2018-09-26 21:34:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-26 21:34:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-26 21:34:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-26 21:34:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-26 21:34:18,510 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-26 21:34:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:18,511 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-26 21:34:18,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-26 21:34:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-26 21:34:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-26 21:34:18,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:18,512 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-26 21:34:18,512 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:18,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-26 21:34:18,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:18,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:18,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:18,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:20,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:20,568 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 [2018-09-26 21:34:20,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:20,616 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:20,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:20,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:23,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:23,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-26 21:34:23,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-26 21:34:23,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-26 21:34:23,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-26 21:34:23,487 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-26 21:34:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:23,811 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-26 21:34:23,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:34:23,812 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-26 21:34:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:23,813 INFO L225 Difference]: With dead ends: 143 [2018-09-26 21:34:23,813 INFO L226 Difference]: Without dead ends: 142 [2018-09-26 21:34:23,815 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 [2018-09-26 21:34:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-26 21:34:23,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-26 21:34:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-26 21:34:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-26 21:34:23,820 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-26 21:34:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:23,820 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-26 21:34:23,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-26 21:34:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-26 21:34:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-26 21:34:23,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:23,822 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-26 21:34:23,822 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:23,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-26 21:34:23,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:23,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:23,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:23,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:23,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:25,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:25,910 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 [2018-09-26 21:34:25,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:25,996 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-26 21:34:25,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:25,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:28,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:28,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-26 21:34:28,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-26 21:34:28,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-26 21:34:28,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-26 21:34:28,854 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-26 21:34:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:29,227 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-26 21:34:29,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:34:29,228 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-26 21:34:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:29,229 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:34:29,229 INFO L226 Difference]: Without dead ends: 144 [2018-09-26 21:34:29,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-26 21:34:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-26 21:34:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-26 21:34:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-26 21:34:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-26 21:34:29,234 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-26 21:34:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:29,235 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-26 21:34:29,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-26 21:34:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-26 21:34:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-26 21:34:29,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:29,236 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-26 21:34:29,236 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:29,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:29,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-26 21:34:29,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:29,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:29,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:29,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:29,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:31,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:31,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:34:31,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:31,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:31,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:31,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:34,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:34,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-26 21:34:34,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-26 21:34:34,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-26 21:34:34,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-26 21:34:34,724 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-26 21:34:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:35,097 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-26 21:34:35,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:34:35,097 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-26 21:34:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:35,098 INFO L225 Difference]: With dead ends: 147 [2018-09-26 21:34:35,098 INFO L226 Difference]: Without dead ends: 146 [2018-09-26 21:34:35,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-26 21:34:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-26 21:34:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-26 21:34:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-26 21:34:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-26 21:34:35,106 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-26 21:34:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:35,106 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-26 21:34:35,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-26 21:34:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-26 21:34:35,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-26 21:34:35,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:35,107 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-26 21:34:35,108 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:35,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:35,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-26 21:34:35,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:35,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:35,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:35,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:35,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:37,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:37,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:34:37,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:37,835 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-26 21:34:37,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:37,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:40,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:40,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-26 21:34:40,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-26 21:34:40,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-26 21:34:40,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-26 21:34:40,969 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-26 21:34:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:41,327 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-26 21:34:41,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:34:41,328 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-26 21:34:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:41,329 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:34:41,329 INFO L226 Difference]: Without dead ends: 148 [2018-09-26 21:34:41,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-26 21:34:41,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-26 21:34:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-26 21:34:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-26 21:34:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-26 21:34:41,334 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-26 21:34:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:41,335 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-26 21:34:41,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-26 21:34:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-26 21:34:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-26 21:34:41,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:41,336 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-26 21:34:41,336 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:41,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:41,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-26 21:34:41,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:41,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:41,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:41,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:41,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:43,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:43,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:34:43,944 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:44,043 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-26 21:34:44,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:44,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:46,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:46,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-26 21:34:46,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-26 21:34:46,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-26 21:34:46,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-26 21:34:46,955 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-26 21:34:47,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:47,586 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-26 21:34:47,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:34:47,587 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-26 21:34:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:47,588 INFO L225 Difference]: With dead ends: 151 [2018-09-26 21:34:47,588 INFO L226 Difference]: Without dead ends: 150 [2018-09-26 21:34:47,589 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 [2018-09-26 21:34:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-26 21:34:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-26 21:34:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-26 21:34:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-26 21:34:47,594 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-26 21:34:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:47,595 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-26 21:34:47,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-26 21:34:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-26 21:34:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-26 21:34:47,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:47,596 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-26 21:34:47,596 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:47,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:47,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-26 21:34:47,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:47,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:47,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:47,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:47,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:49,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:49,959 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 [2018-09-26 21:34:49,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:50,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:53,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:53,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-26 21:34:53,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-26 21:34:53,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-26 21:34:53,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-26 21:34:53,284 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-26 21:34:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:53,651 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-26 21:34:53,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:34:53,651 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-26 21:34:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:53,652 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:34:53,653 INFO L226 Difference]: Without dead ends: 152 [2018-09-26 21:34:53,654 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 [2018-09-26 21:34:53,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-26 21:34:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-26 21:34:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-26 21:34:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-26 21:34:53,659 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-26 21:34:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:53,659 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-26 21:34:53,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-26 21:34:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-26 21:34:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-26 21:34:53,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:53,660 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-26 21:34:53,660 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:53,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-26 21:34:53,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:53,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:53,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:53,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:53,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:56,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:56,097 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 [2018-09-26 21:34:56,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:56,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:56,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:56,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:59,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:59,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-26 21:34:59,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-26 21:34:59,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-26 21:34:59,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-26 21:34:59,479 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-26 21:34:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:59,886 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-26 21:34:59,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:34:59,887 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-26 21:34:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:59,888 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:34:59,888 INFO L226 Difference]: Without dead ends: 154 [2018-09-26 21:34:59,888 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 [2018-09-26 21:34:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-26 21:34:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-26 21:34:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-26 21:34:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-26 21:34:59,893 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-26 21:34:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:59,893 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-26 21:34:59,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-26 21:34:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-26 21:34:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-26 21:34:59,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:59,894 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-26 21:34:59,894 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:59,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:59,894 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-26 21:34:59,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:59,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:59,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:59,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:59,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:02,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:02,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:35:02,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:35:02,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-26 21:35:02,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:02,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:05,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:05,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-26 21:35:05,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-26 21:35:05,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-26 21:35:05,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-26 21:35:05,709 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-26 21:35:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:06,123 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-26 21:35:06,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:35:06,124 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-26 21:35:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:06,125 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:35:06,125 INFO L226 Difference]: Without dead ends: 156 [2018-09-26 21:35:06,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-26 21:35:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-26 21:35:06,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-26 21:35:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-26 21:35:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-26 21:35:06,130 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-26 21:35:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:06,130 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-26 21:35:06,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-26 21:35:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-26 21:35:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-26 21:35:06,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:06,131 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-26 21:35:06,131 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:06,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:06,132 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-26 21:35:06,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:06,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:06,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:06,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:06,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:08,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:08,926 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 [2018-09-26 21:35:08,934 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:35:08,976 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:35:08,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:08,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:12,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:12,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-26 21:35:12,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-26 21:35:12,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-26 21:35:12,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-26 21:35:12,126 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-26 21:35:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:12,468 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-26 21:35:12,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:35:12,468 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-26 21:35:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:12,469 INFO L225 Difference]: With dead ends: 159 [2018-09-26 21:35:12,469 INFO L226 Difference]: Without dead ends: 158 [2018-09-26 21:35:12,470 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 [2018-09-26 21:35:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-26 21:35:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-26 21:35:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-26 21:35:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-26 21:35:12,474 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-26 21:35:12,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:12,474 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-26 21:35:12,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-26 21:35:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-26 21:35:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-26 21:35:12,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:12,475 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-26 21:35:12,475 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:12,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:12,476 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-26 21:35:12,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:12,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:12,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:12,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:12,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:15,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:15,367 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) [2018-09-26 21:35:15,376 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:15,498 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-26 21:35:15,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:15,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:18,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:18,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-26 21:35:18,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-26 21:35:18,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-26 21:35:18,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-26 21:35:18,949 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-26 21:35:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:19,327 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-26 21:35:19,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:35:19,327 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-26 21:35:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:19,328 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:35:19,329 INFO L226 Difference]: Without dead ends: 160 [2018-09-26 21:35:19,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-26 21:35:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-26 21:35:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-26 21:35:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-26 21:35:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-26 21:35:19,335 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-26 21:35:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:19,336 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-26 21:35:19,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-26 21:35:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-26 21:35:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-26 21:35:19,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:19,337 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-26 21:35:19,337 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:19,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:19,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-26 21:35:19,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:19,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:19,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:19,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:19,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:21,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:21,947 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 [2018-09-26 21:35:21,954 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:35:22,062 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-26 21:35:22,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:22,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:25,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:25,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-26 21:35:25,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-26 21:35:25,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-26 21:35:25,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-26 21:35:25,673 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-26 21:35:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:26,059 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-26 21:35:26,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:35:26,060 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-26 21:35:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:26,061 INFO L225 Difference]: With dead ends: 163 [2018-09-26 21:35:26,061 INFO L226 Difference]: Without dead ends: 162 [2018-09-26 21:35:26,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-26 21:35:26,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-26 21:35:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-26 21:35:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-26 21:35:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-26 21:35:26,067 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-26 21:35:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:26,068 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-26 21:35:26,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-26 21:35:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-26 21:35:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-26 21:35:26,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:26,069 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-26 21:35:26,069 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:26,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-26 21:35:26,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:26,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:26,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:26,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:26,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:29,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:29,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:35:29,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:29,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:32,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:32,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-26 21:35:32,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-26 21:35:32,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-26 21:35:32,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-26 21:35:32,634 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. Received shutdown request... [2018-09-26 21:35:32,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:35:32,905 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:35:32,911 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:35:32,912 INFO L202 PluginConnector]: Adding new model MonadicInvariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:35:32 BoogieIcfgContainer [2018-09-26 21:35:32,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:35:32,913 INFO L168 Benchmark]: Toolchain (without parser) took 236653.41 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -147.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 408.1 MB). Peak memory consumption was 260.8 MB. Max. memory is 7.1 GB. [2018-09-26 21:35:32,915 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-09-26 21:35:32,915 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.40 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. [2018-09-26 21:35:32,915 INFO L168 Benchmark]: Boogie Preprocessor took 25.89 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. [2018-09-26 21:35:32,916 INFO L168 Benchmark]: RCFGBuilder took 240.48 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. [2018-09-26 21:35:32,916 INFO L168 Benchmark]: TraceAbstraction took 236335.98 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -147.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 387.0 MB). Peak memory consumption was 239.6 MB. Max. memory is 7.1 GB. [2018-09-26 21:35:32,919 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.40 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 25.89 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 240.48 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 236335.98 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -147.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 387.0 MB). Peak memory consumption was 239.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was constructing difference of abstraction (162states) and FLOYD_HOARE automaton (currently 63 states, 162 states before enhancement), while ReachableStatesComputation was computing reachable states (122 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 236.2s OverallTime, 80 OverallIterations, 80 TraceHistogramMax, 19.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 161 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13123 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341280 ImplicationChecksByTransitivity, 203.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=79, 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, 79 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 207.8s InterpolantComputationTime, 13117 NumberOfCodeBlocks, 13117 NumberOfCodeBlocksAsserted, 1771 NumberOfCheckSat, 12958 ConstructedInterpolants, 0 QuantifiedInterpolants, 8346212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13272 ConjunctsInSsa, 3397 ConjunctsInUnsatCore, 159 InterpolantComputations, 1 PerfectInterpolantSequences, 0/341280 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-35-32-928.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/MonadicInvariant01.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-35-32-928.csv Completed graceful shutdown