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/ArrayInit02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:49:46,144 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:49:46,146 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:49:46,158 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:49:46,159 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:49:46,160 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:49:46,161 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:49:46,162 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:49:46,164 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:49:46,165 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:49:46,166 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 08:49:46,190 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 [2018-10-03 08:49:46,214 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:49:46,215 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:49:46,216 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:49:46,216 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:49:46,217 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:49:46,217 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:49:46,217 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:49:46,217 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:49:46,218 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:49:46,218 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:49:46,218 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:49:46,218 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:49:46,218 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:49:46,219 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:49:46,219 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:49:46,219 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:49:46,219 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:49:46,220 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:49:46,221 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:49:46,221 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:49:46,221 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:49:46,221 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:49:46,221 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:49:46,222 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:49:46,222 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:49:46,222 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:49:46,222 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:49:46,222 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:49:46,223 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:49:46,223 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:49:46,265 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:49:46,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:49:46,281 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:49:46,282 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:49:46,283 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:49:46,284 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-10-03 08:49:46,284 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-10-03 08:49:46,334 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:49:46,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:49:46,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:49:46,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:49:46,338 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:49:46,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:46" (1/1) ... [2018-10-03 08:49:46,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:46" (1/1) ... [2018-10-03 08:49:46,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:49:46,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:49:46,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:49:46,380 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:49:46,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:46" (1/1) ... [2018-10-03 08:49:46,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:46" (1/1) ... [2018-10-03 08:49:46,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:46" (1/1) ... [2018-10-03 08:49:46,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:46" (1/1) ... [2018-10-03 08:49:46,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:46" (1/1) ... [2018-10-03 08:49:46,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:46" (1/1) ... [2018-10-03 08:49:46,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:46" (1/1) ... [2018-10-03 08:49:46,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:49:46,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:49:46,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:49:46,405 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:49:46,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:46" (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 [2018-10-03 08:49:46,458 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-03 08:49:46,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 08:49:46,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 08:49:46,798 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 08:49:46,798 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:49:46 BoogieIcfgContainer [2018-10-03 08:49:46,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:49:46,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:49:46,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:49:46,803 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:49:46,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:49:46" (1/2) ... [2018-10-03 08:49:46,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e07029 and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:49:46, skipping insertion in model container [2018-10-03 08:49:46,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:49:46" (2/2) ... [2018-10-03 08:49:46,807 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-10-03 08:49:46,817 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:49:46,824 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:49:46,872 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:49:46,873 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:49:46,873 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:49:46,874 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:49:46,874 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:49:46,874 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:49:46,874 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:49:46,874 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:49:46,875 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:49:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-03 08:49:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:49:46,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:46,897 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-03 08:49:46,898 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:46,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:46,904 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-10-03 08:49:46,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:46,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:46,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:46,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:46,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:47,145 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:49:47,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 08:49:47,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:49:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:49:47,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:49:47,170 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-10-03 08:49:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:47,338 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-10-03 08:49:47,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:49:47,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-03 08:49:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:47,354 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:49:47,355 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:49:47,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:49:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:49:47,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-10-03 08:49:47,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:49:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-10-03 08:49:47,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-10-03 08:49:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:47,400 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-10-03 08:49:47,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:49:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-10-03 08:49:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:49:47,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:47,401 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:49:47,402 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:47,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-10-03 08:49:47,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:47,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:47,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:47,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:47,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:47,492 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:49:47,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-03 08:49:47,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:49:47,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:49:47,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:49:47,495 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-10-03 08:49:47,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:47,581 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-03 08:49:47,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:49:47,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-03 08:49:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:47,583 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:49:47,583 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:49:47,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:49:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:49:47,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-03 08:49:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:49:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-10-03 08:49:47,589 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-10-03 08:49:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:47,590 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-10-03 08:49:47,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:49:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-10-03 08:49:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:49:47,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:47,591 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:49:47,592 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:47,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:47,592 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-10-03 08:49:47,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:47,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:47,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:47,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:47,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-03 08:49:47,638 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:49:47,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 08:49:47,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:49:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:49:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:49:47,640 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-10-03 08:49:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:47,696 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-10-03 08:49:47,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:49:47,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-03 08:49:47,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:47,697 INFO L225 Difference]: With dead ends: 24 [2018-10-03 08:49:47,697 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:49:47,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:49:47,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:49:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-10-03 08:49:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:49:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-03 08:49:47,702 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-03 08:49:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:47,703 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-03 08:49:47,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:49:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-03 08:49:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:49:47,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:47,704 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:49:47,704 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:47,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:47,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-10-03 08:49:47,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:47,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:47,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:47,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:47,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:48,029 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-03 08:49:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:48,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:48,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:49:48,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:48,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:48,349 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-03 08:49:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:48,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:48,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-03 08:49:48,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:49:48,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:49:48,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:49:48,388 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-10-03 08:49:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:48,634 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-10-03 08:49:48,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:49:48,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-10-03 08:49:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:48,636 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:49:48,636 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:49:48,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:49:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:49:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-10-03 08:49:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:49:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-03 08:49:48,642 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-10-03 08:49:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:48,642 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-03 08:49:48,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:49:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-03 08:49:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:49:48,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:48,643 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:49:48,644 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:48,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:48,644 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-10-03 08:49:48,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:48,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:48,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:48,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:48,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:48,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:48,701 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 [2018-10-03 08:49:48,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:48,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:48,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:48,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-03 08:49:48,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:49:48,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:49:48,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:49:48,917 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-10-03 08:49:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:49,306 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-03 08:49:49,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:49:49,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:49:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:49,307 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:49:49,307 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:49:49,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:49:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:49:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-10-03 08:49:49,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:49:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-03 08:49:49,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-10-03 08:49:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:49,312 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-03 08:49:49,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:49:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-03 08:49:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:49:49,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:49,313 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:49:49,314 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:49,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:49,314 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-10-03 08:49:49,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:49,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:49,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:49,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:49,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:49,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:49,668 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 [2018-10-03 08:49:49,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:49:49,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:49:49,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:49,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:49,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:49,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-03 08:49:49,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:49:49,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:49:49,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:49:49,982 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-10-03 08:49:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:50,754 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-10-03 08:49:50,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:49:50,756 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-10-03 08:49:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:50,757 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:49:50,757 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:49:50,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:49:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:49:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-03 08:49:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:49:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-03 08:49:50,764 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-10-03 08:49:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:50,764 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-03 08:49:50,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:49:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-03 08:49:50,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 08:49:50,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:50,765 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-03 08:49:50,766 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:50,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:50,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-10-03 08:49:50,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:50,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:50,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:50,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:50,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:50,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:50,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:49:50,999 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:49:51,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 08:49:51,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:51,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:51,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:51,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-03 08:49:51,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:49:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:49:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:49:51,131 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-10-03 08:49:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:51,625 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-10-03 08:49:51,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:49:51,632 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-10-03 08:49:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:51,633 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:49:51,633 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:49:51,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:49:51,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:49:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-03 08:49:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:49:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-03 08:49:51,643 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-03 08:49:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:51,644 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-03 08:49:51,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:49:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-03 08:49:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 08:49:51,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:51,647 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:49:51,647 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:51,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:51,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-10-03 08:49:51,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:51,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:51,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:51,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:51,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:52,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:52,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:49:52,012 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:49:52,024 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:49:52,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:52,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:52,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:52,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-03 08:49:52,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:49:52,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:49:52,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:49:52,143 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-03 08:49:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:52,317 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-10-03 08:49:52,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:49:52,318 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-03 08:49:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:52,319 INFO L225 Difference]: With dead ends: 60 [2018-10-03 08:49:52,320 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:49:52,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:49:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:49:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-10-03 08:49:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:49:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-03 08:49:52,327 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-03 08:49:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:52,327 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-03 08:49:52,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:49:52,328 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-03 08:49:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:49:52,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:52,329 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:49:52,329 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:52,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:52,329 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-10-03 08:49:52,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:52,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:52,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:52,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:52,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:52,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:52,670 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 [2018-10-03 08:49:52,677 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:49:52,691 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-03 08:49:52,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:52,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:52,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:52,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-10-03 08:49:52,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:49:52,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:49:52,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:49:52,890 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-10-03 08:49:53,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:53,677 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-10-03 08:49:53,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:49:53,678 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-10-03 08:49:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:53,680 INFO L225 Difference]: With dead ends: 64 [2018-10-03 08:49:53,680 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 08:49:53,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:49:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 08:49:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-10-03 08:49:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:49:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-03 08:49:53,687 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-10-03 08:49:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:53,687 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-03 08:49:53,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:49:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-03 08:49:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:49:53,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:53,688 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-03 08:49:53,689 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:53,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-10-03 08:49:53,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:53,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:53,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:53,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:53,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:53,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:53,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:49:53,835 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:49:53,860 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-03 08:49:53,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:53,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:54,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:54,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-03 08:49:54,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:49:54,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:49:54,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:49:54,113 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-10-03 08:49:54,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:54,381 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-03 08:49:54,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:49:54,381 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-10-03 08:49:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:54,383 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:49:54,383 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 08:49:54,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:49:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 08:49:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-10-03 08:49:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 08:49:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-03 08:49:54,392 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-10-03 08:49:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:54,392 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-03 08:49:54,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:49:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-03 08:49:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 08:49:54,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:54,394 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-03 08:49:54,394 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:54,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:54,394 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-10-03 08:49:54,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:54,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:54,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:54,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:54,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:55,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:55,062 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 [2018-10-03 08:49:55,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:55,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:55,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:55,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-10-03 08:49:55,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:49:55,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:49:55,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:49:55,272 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-03 08:49:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:56,066 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-10-03 08:49:56,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:49:56,066 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-10-03 08:49:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:56,068 INFO L225 Difference]: With dead ends: 79 [2018-10-03 08:49:56,068 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:49:56,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:49:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:49:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-10-03 08:49:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 08:49:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-03 08:49:56,076 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-10-03 08:49:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:56,077 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-03 08:49:56,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:49:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-03 08:49:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 08:49:56,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:56,078 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-03 08:49:56,078 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:56,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:56,079 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-10-03 08:49:56,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:56,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:56,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:56,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:49:56,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:56,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:56,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:49:56,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:49:56,251 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:49:56,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:56,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:56,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:56,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-03 08:49:56,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:49:56,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:49:56,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:49:56,373 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-10-03 08:49:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:49:56,717 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-10-03 08:49:56,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:49:56,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-10-03 08:49:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:49:56,719 INFO L225 Difference]: With dead ends: 90 [2018-10-03 08:49:56,719 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:49:56,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:49:56,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:49:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-10-03 08:49:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:49:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-03 08:49:56,728 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-10-03 08:49:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:49:56,728 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-03 08:49:56,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:49:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-03 08:49:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:49:56,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:49:56,729 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-03 08:49:56,730 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:49:56,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:49:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-10-03 08:49:56,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:49:56,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:49:56,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:56,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:49:56,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:49:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:49:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:56,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:49:56,996 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 [2018-10-03 08:49:57,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:49:57,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:49:57,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:49:57,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:49:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:49:57,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:49:57,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-10-03 08:49:57,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:49:57,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:49:57,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:49:57,651 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-10-03 08:49:58,359 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-10-03 08:50:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:00,920 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-03 08:50:00,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:50:00,921 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-10-03 08:50:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:00,923 INFO L225 Difference]: With dead ends: 116 [2018-10-03 08:50:00,923 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:50:00,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=469, Invalid=3953, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:50:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:50:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-10-03 08:50:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 08:50:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-03 08:50:00,933 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-10-03 08:50:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:00,934 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-03 08:50:00,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:50:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-03 08:50:00,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-03 08:50:00,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:00,935 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-03 08:50:00,935 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:00,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-10-03 08:50:00,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:00,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:00,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:00,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:00,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:01,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:01,305 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 [2018-10-03 08:50:01,313 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:50:01,322 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:50:01,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:01,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:01,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:01,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-10-03 08:50:01,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:50:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:50:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:50:01,595 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-03 08:50:02,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:02,617 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-10-03 08:50:02,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:50:02,617 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-03 08:50:02,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:02,618 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:50:02,618 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:50:02,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:50:02,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:50:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-10-03 08:50:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 08:50:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-03 08:50:02,632 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-10-03 08:50:02,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:02,632 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-03 08:50:02,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:50:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-03 08:50:02,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-03 08:50:02,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:02,633 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-03 08:50:02,633 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:02,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:02,634 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-10-03 08:50:02,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:02,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:02,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:02,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:02,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:02,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:02,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:50:02,846 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:50:02,861 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:50:02,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:02,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:03,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:03,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-03 08:50:03,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:50:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:50:03,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:50:03,154 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-10-03 08:50:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:03,751 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-10-03 08:50:03,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:50:03,751 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-10-03 08:50:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:03,752 INFO L225 Difference]: With dead ends: 120 [2018-10-03 08:50:03,752 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:50:03,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:50:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:50:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-10-03 08:50:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:50:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-03 08:50:03,762 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-10-03 08:50:03,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:03,762 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-03 08:50:03,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:50:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-03 08:50:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:50:03,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:03,764 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-03 08:50:03,764 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:03,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:03,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-10-03 08:50:03,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:03,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:03,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:03,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:03,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:04,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:04,304 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 [2018-10-03 08:50:04,314 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:50:04,337 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:50:04,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:04,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:04,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:04,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-10-03 08:50:04,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:50:04,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:50:04,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:50:04,764 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-10-03 08:50:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:06,590 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-10-03 08:50:06,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:50:06,598 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-10-03 08:50:06,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:06,598 INFO L225 Difference]: With dead ends: 124 [2018-10-03 08:50:06,599 INFO L226 Difference]: Without dead ends: 94 [2018-10-03 08:50:06,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:50:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-03 08:50:06,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-10-03 08:50:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:50:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-10-03 08:50:06,618 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-10-03 08:50:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:06,618 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-10-03 08:50:06,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:50:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-10-03 08:50:06,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:50:06,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:06,623 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-03 08:50:06,624 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:06,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:06,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-10-03 08:50:06,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:06,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:06,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:06,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:06,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:06,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:06,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:50:06,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:06,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:07,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:07,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-03 08:50:07,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:50:07,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:50:07,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:50:07,140 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-10-03 08:50:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:07,582 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-10-03 08:50:07,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:50:07,584 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-10-03 08:50:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:07,585 INFO L225 Difference]: With dead ends: 135 [2018-10-03 08:50:07,585 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 08:50:07,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:50:07,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 08:50:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-10-03 08:50:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 08:50:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-03 08:50:07,593 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-03 08:50:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:07,594 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-03 08:50:07,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:50:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-03 08:50:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 08:50:07,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:07,595 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-03 08:50:07,595 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:07,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:07,596 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-10-03 08:50:07,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:07,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:07,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:07,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:07,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:08,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:08,257 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 [2018-10-03 08:50:08,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:50:08,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:50:08,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:08,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:09,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:09,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-10-03 08:50:09,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:50:09,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:50:09,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:50:09,085 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-10-03 08:50:11,438 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-10-03 08:50:11,950 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-03 08:50:12,623 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2018-10-03 08:50:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:13,500 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-03 08:50:13,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:50:13,501 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-10-03 08:50:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:13,502 INFO L225 Difference]: With dead ends: 173 [2018-10-03 08:50:13,502 INFO L226 Difference]: Without dead ends: 102 [2018-10-03 08:50:13,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=829, Invalid=8483, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:50:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-03 08:50:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-10-03 08:50:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:50:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-03 08:50:13,515 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-10-03 08:50:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:13,516 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-03 08:50:13,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:50:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-03 08:50:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:50:13,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:13,517 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-03 08:50:13,517 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:13,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:13,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-10-03 08:50:13,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:13,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:13,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:13,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:13,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:13,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:13,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:50:13,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:50:14,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-03 08:50:14,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:14,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:15,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:15,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-10-03 08:50:15,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:50:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:50:15,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:50:15,097 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-10-03 08:50:17,163 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2018-10-03 08:50:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:19,420 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-10-03 08:50:19,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:50:19,421 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-10-03 08:50:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:19,422 INFO L225 Difference]: With dead ends: 192 [2018-10-03 08:50:19,422 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 08:50:19,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2443 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=969, Invalid=10373, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:50:19,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 08:50:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-10-03 08:50:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-03 08:50:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-03 08:50:19,436 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-10-03 08:50:19,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:19,436 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-03 08:50:19,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:50:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-03 08:50:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-03 08:50:19,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:19,437 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-03 08:50:19,437 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:19,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:19,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-10-03 08:50:19,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:19,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:19,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:19,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:19,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:20,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:20,178 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 [2018-10-03 08:50:20,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:50:20,207 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:50:20,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:20,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:20,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:20,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-10-03 08:50:20,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:50:20,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:50:20,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:50:20,623 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-10-03 08:50:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:23,020 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-10-03 08:50:23,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:50:23,021 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-10-03 08:50:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:23,022 INFO L225 Difference]: With dead ends: 169 [2018-10-03 08:50:23,022 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 08:50:23,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=319, Invalid=3221, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:50:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 08:50:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-10-03 08:50:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-03 08:50:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-03 08:50:23,037 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-10-03 08:50:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:23,037 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-03 08:50:23,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:50:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-03 08:50:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 08:50:23,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:23,039 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-03 08:50:23,039 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:23,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-10-03 08:50:23,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:23,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:23,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:23,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:23,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:23,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:23,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:50:23,460 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:50:23,480 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-03 08:50:23,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:23,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:23,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:23,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-03 08:50:23,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:50:23,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:50:23,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:50:23,794 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-10-03 08:50:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:24,312 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-10-03 08:50:24,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:50:24,313 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-10-03 08:50:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:24,314 INFO L225 Difference]: With dead ends: 180 [2018-10-03 08:50:24,314 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:50:24,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:50:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:50:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-10-03 08:50:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:50:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-03 08:50:24,327 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-10-03 08:50:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:24,327 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-03 08:50:24,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:50:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-03 08:50:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:50:24,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:24,328 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-03 08:50:24,328 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:24,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:24,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-10-03 08:50:24,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:24,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:24,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:24,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:24,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:25,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:25,495 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 [2018-10-03 08:50:25,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:50:25,524 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:50:25,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:25,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:25,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:25,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-10-03 08:50:25,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:50:25,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:50:25,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:50:25,990 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-10-03 08:50:28,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:28,779 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-10-03 08:50:28,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:50:28,783 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-10-03 08:50:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:28,784 INFO L225 Difference]: With dead ends: 184 [2018-10-03 08:50:28,785 INFO L226 Difference]: Without dead ends: 138 [2018-10-03 08:50:28,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=359, Invalid=3801, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:50:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-03 08:50:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-10-03 08:50:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:50:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-03 08:50:28,798 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-03 08:50:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:28,799 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-03 08:50:28,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:50:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-03 08:50:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:50:28,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:28,800 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-03 08:50:28,800 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:28,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:28,800 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-10-03 08:50:28,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:28,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:28,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:28,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:28,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:29,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:29,178 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 [2018-10-03 08:50:29,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:29,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:29,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:29,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-03 08:50:29,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:50:29,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:50:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:50:29,602 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-10-03 08:50:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:30,383 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-10-03 08:50:30,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:50:30,384 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-10-03 08:50:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:30,385 INFO L225 Difference]: With dead ends: 195 [2018-10-03 08:50:30,385 INFO L226 Difference]: Without dead ends: 96 [2018-10-03 08:50:30,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=2159, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:50:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-03 08:50:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-10-03 08:50:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-03 08:50:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-03 08:50:30,397 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-10-03 08:50:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:30,398 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-03 08:50:30,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:50:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-03 08:50:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-03 08:50:30,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:30,399 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-03 08:50:30,399 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:30,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-10-03 08:50:30,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:30,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:30,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:30,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:30,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:31,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:31,061 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 [2018-10-03 08:50:31,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:50:31,091 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:50:31,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:31,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:32,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:32,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-10-03 08:50:32,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:50:32,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:50:32,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3030, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:50:32,374 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-10-03 08:50:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:38,953 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-10-03 08:50:38,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 08:50:38,954 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-10-03 08:50:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:38,954 INFO L225 Difference]: With dead ends: 249 [2018-10-03 08:50:38,955 INFO L226 Difference]: Without dead ends: 146 [2018-10-03 08:50:38,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1449, Invalid=17183, Unknown=0, NotChecked=0, Total=18632 [2018-10-03 08:50:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-03 08:50:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-10-03 08:50:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:50:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-03 08:50:38,974 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-10-03 08:50:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:38,974 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-03 08:50:38,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:50:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-03 08:50:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:50:38,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:38,975 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-03 08:50:38,975 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:38,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:38,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-10-03 08:50:38,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:38,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:38,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:38,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:38,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:39,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:39,906 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 [2018-10-03 08:50:39,914 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:50:39,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:50:39,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:39,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:40,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:40,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-10-03 08:50:40,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:50:40,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:50:40,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:50:40,948 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-10-03 08:50:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:44,320 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-10-03 08:50:44,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:50:44,321 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-10-03 08:50:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:44,322 INFO L225 Difference]: With dead ends: 214 [2018-10-03 08:50:44,322 INFO L226 Difference]: Without dead ends: 160 [2018-10-03 08:50:44,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=445, Invalid=5105, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:50:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-03 08:50:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-10-03 08:50:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:50:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-03 08:50:44,336 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-10-03 08:50:44,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:44,337 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-03 08:50:44,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:50:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-03 08:50:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:50:44,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:44,338 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-03 08:50:44,338 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:44,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:44,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-10-03 08:50:44,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:44,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:44,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:44,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:44,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:44,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:44,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:50:44,751 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:50:44,769 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:50:44,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:44,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:45,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:45,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-10-03 08:50:45,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:50:45,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:50:45,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1636, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:50:45,570 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-10-03 08:50:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:46,320 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-10-03 08:50:46,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:50:46,320 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-10-03 08:50:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:46,322 INFO L225 Difference]: With dead ends: 225 [2018-10-03 08:50:46,322 INFO L226 Difference]: Without dead ends: 110 [2018-10-03 08:50:46,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=916, Invalid=2866, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:50:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-03 08:50:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-10-03 08:50:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-03 08:50:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-03 08:50:46,340 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-10-03 08:50:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:46,340 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-03 08:50:46,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:50:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-03 08:50:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-03 08:50:46,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:46,341 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-03 08:50:46,341 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:46,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-10-03 08:50:46,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:46,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:46,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:46,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:46,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:47,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:47,211 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 [2018-10-03 08:50:47,218 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:50:47,247 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:50:47,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:47,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:47,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:47,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-10-03 08:50:47,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:50:47,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:50:47,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2320, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:50:47,941 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-10-03 08:50:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:51,987 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-10-03 08:50:51,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:50:51,991 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-10-03 08:50:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:51,993 INFO L225 Difference]: With dead ends: 229 [2018-10-03 08:50:51,993 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 08:50:51,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=491, Invalid=5829, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:50:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 08:50:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-10-03 08:50:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-03 08:50:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-03 08:50:52,015 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-03 08:50:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:52,016 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-03 08:50:52,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:50:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-03 08:50:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-03 08:50:52,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:52,017 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-03 08:50:52,017 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:52,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:52,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-10-03 08:50:52,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:52,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:52,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:52,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:52,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:52,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:52,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:50:52,475 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:50:52,507 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 08:50:52,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:50:52,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:53,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:53,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-10-03 08:50:53,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:50:53,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:50:53,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:50:53,013 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-10-03 08:50:54,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:50:54,721 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-10-03 08:50:54,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:50:54,722 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-10-03 08:50:54,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:50:54,723 INFO L225 Difference]: With dead ends: 240 [2018-10-03 08:50:54,723 INFO L226 Difference]: Without dead ends: 117 [2018-10-03 08:50:54,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:50:54,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-03 08:50:54,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-10-03 08:50:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:50:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-03 08:50:54,740 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-10-03 08:50:54,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:50:54,740 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-03 08:50:54,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:50:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-03 08:50:54,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 08:50:54,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:50:54,741 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-03 08:50:54,741 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:50:54,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:50:54,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-10-03 08:50:54,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:50:54,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:50:54,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:54,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:50:54,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:50:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:55,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:50:55,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:50:55,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:50:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:50:55,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:50:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:50:56,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:50:56,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-10-03 08:50:56,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:50:56,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:50:56,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2618, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:50:56,814 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-10-03 08:51:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:01,231 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-10-03 08:51:01,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:51:01,232 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-10-03 08:51:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:01,233 INFO L225 Difference]: With dead ends: 244 [2018-10-03 08:51:01,233 INFO L226 Difference]: Without dead ends: 182 [2018-10-03 08:51:01,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=539, Invalid=6601, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:51:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-03 08:51:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-10-03 08:51:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 08:51:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-03 08:51:01,254 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-10-03 08:51:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:01,255 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-03 08:51:01,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:51:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-03 08:51:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 08:51:01,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:01,255 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-03 08:51:01,256 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:01,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-10-03 08:51:01,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:01,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:01,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:01,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:01,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:01,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:01,873 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 [2018-10-03 08:51:01,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:51:01,908 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:51:01,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:01,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:02,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:02,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-03 08:51:02,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:51:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:51:02,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:51:02,443 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-10-03 08:51:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:03,565 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-10-03 08:51:03,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:51:03,566 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-10-03 08:51:03,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:03,567 INFO L225 Difference]: With dead ends: 255 [2018-10-03 08:51:03,567 INFO L226 Difference]: Without dead ends: 124 [2018-10-03 08:51:03,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1157, Invalid=3673, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:51:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-03 08:51:03,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-10-03 08:51:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-03 08:51:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-03 08:51:03,588 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-10-03 08:51:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:03,588 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-03 08:51:03,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:51:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-03 08:51:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-03 08:51:03,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:03,588 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-03 08:51:03,589 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:03,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:03,589 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-10-03 08:51:03,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:03,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:03,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:03,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:03,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:04,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:04,744 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 [2018-10-03 08:51:04,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:51:04,785 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:51:04,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:04,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:07,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:07,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-10-03 08:51:07,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:51:07,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:51:07,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4940, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:51:07,013 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-10-03 08:51:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:17,048 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-10-03 08:51:17,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-03 08:51:17,048 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-10-03 08:51:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:17,050 INFO L225 Difference]: With dead ends: 325 [2018-10-03 08:51:17,050 INFO L226 Difference]: Without dead ends: 190 [2018-10-03 08:51:17,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=2229, Invalid=28923, Unknown=0, NotChecked=0, Total=31152 [2018-10-03 08:51:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-03 08:51:17,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-10-03 08:51:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-03 08:51:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-10-03 08:51:17,072 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-10-03 08:51:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:17,072 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-10-03 08:51:17,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:51:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-10-03 08:51:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 08:51:17,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:17,073 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-03 08:51:17,073 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:17,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:17,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-10-03 08:51:17,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:17,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:17,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:17,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:17,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:18,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:18,058 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 [2018-10-03 08:51:18,066 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:51:18,089 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:51:18,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:18,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:19,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:19,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-10-03 08:51:19,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:51:19,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:51:19,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:51:19,016 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-10-03 08:51:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:24,823 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-10-03 08:51:24,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:51:24,823 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-10-03 08:51:24,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:24,825 INFO L225 Difference]: With dead ends: 274 [2018-10-03 08:51:24,825 INFO L226 Difference]: Without dead ends: 204 [2018-10-03 08:51:24,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=641, Invalid=8289, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:51:24,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-03 08:51:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-10-03 08:51:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-03 08:51:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-03 08:51:24,852 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-03 08:51:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:24,852 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-03 08:51:24,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:51:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-03 08:51:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-03 08:51:24,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:24,853 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-03 08:51:24,853 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:24,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:24,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-10-03 08:51:24,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:24,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:24,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:24,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:24,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:25,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:25,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:51:25,605 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:51:25,637 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:51:25,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:25,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:26,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:26,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-10-03 08:51:26,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:51:26,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:51:26,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2604, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:51:26,608 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-10-03 08:51:27,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:27,694 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-10-03 08:51:27,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:51:27,695 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-10-03 08:51:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:27,696 INFO L225 Difference]: With dead ends: 285 [2018-10-03 08:51:27,696 INFO L226 Difference]: Without dead ends: 138 [2018-10-03 08:51:27,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1426, Invalid=4580, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:51:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-03 08:51:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-10-03 08:51:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-03 08:51:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-03 08:51:27,721 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-03 08:51:27,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:27,722 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-03 08:51:27,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:51:27,722 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-03 08:51:27,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-03 08:51:27,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:27,722 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-03 08:51:27,723 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:27,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:27,723 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-10-03 08:51:27,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:27,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:27,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:27,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:27,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 18 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:29,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:29,044 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 [2018-10-03 08:51:29,052 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:51:29,088 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-03 08:51:29,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:29,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 648 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:32,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:32,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-10-03 08:51:32,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:51:32,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:51:32,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=6069, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:51:32,764 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. [2018-10-03 08:51:41,931 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-03 08:51:42,167 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-03 08:51:44,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:44,363 INFO L93 Difference]: Finished difference Result 363 states and 369 transitions. [2018-10-03 08:51:44,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-03 08:51:44,364 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 135 [2018-10-03 08:51:44,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:44,366 INFO L225 Difference]: With dead ends: 363 [2018-10-03 08:51:44,366 INFO L226 Difference]: Without dead ends: 212 [2018-10-03 08:51:44,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8563 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=2679, Invalid=35933, Unknown=0, NotChecked=0, Total=38612 [2018-10-03 08:51:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-03 08:51:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2018-10-03 08:51:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 08:51:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-03 08:51:44,395 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2018-10-03 08:51:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:44,395 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-03 08:51:44,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:51:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-03 08:51:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 08:51:44,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:44,396 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-03 08:51:44,396 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:44,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash 847427031, now seen corresponding path program 31 times [2018-10-03 08:51:44,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:44,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:44,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:44,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:44,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:46,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:46,421 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 [2018-10-03 08:51:46,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:46,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:48,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:48,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-10-03 08:51:48,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:51:48,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:51:48,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3990, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:51:48,788 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 65 states. [2018-10-03 08:51:53,958 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-03 08:51:54,243 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-03 08:51:54,505 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-03 08:51:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:56,332 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2018-10-03 08:51:56,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:51:56,333 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 142 [2018-10-03 08:51:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:56,335 INFO L225 Difference]: With dead ends: 304 [2018-10-03 08:51:56,335 INFO L226 Difference]: Without dead ends: 226 [2018-10-03 08:51:56,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=751, Invalid=10169, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:51:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-03 08:51:56,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 147. [2018-10-03 08:51:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-03 08:51:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-10-03 08:51:56,365 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 142 [2018-10-03 08:51:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:56,365 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-10-03 08:51:56,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:51:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-10-03 08:51:56,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 08:51:56,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:56,366 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-03 08:51:56,366 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:56,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:56,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1796978306, now seen corresponding path program 32 times [2018-10-03 08:51:56,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:56,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:56,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:56,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:51:56,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:51:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:57,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:51:57,514 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 [2018-10-03 08:51:57,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:51:57,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:51:57,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:51:57,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:51:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:51:58,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:51:58,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-03 08:51:58,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:51:58,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:51:58,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:51:58,461 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 65 states. [2018-10-03 08:51:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:51:59,807 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2018-10-03 08:51:59,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:51:59,808 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2018-10-03 08:51:59,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:51:59,809 INFO L225 Difference]: With dead ends: 315 [2018-10-03 08:51:59,809 INFO L226 Difference]: Without dead ends: 152 [2018-10-03 08:51:59,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1723, Invalid=5587, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:51:59,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-03 08:51:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2018-10-03 08:51:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-03 08:51:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-03 08:51:59,853 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 146 [2018-10-03 08:51:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:51:59,854 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-03 08:51:59,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:51:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-03 08:51:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-03 08:51:59,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:51:59,855 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-03 08:51:59,855 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:51:59,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:51:59,855 INFO L82 PathProgramCache]: Analyzing trace with hash -193355018, now seen corresponding path program 33 times [2018-10-03 08:51:59,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:51:59,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:51:59,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:59,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:51:59,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:51:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 20 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:01,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:01,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:52:01,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:52:01,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-03 08:52:01,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:01,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 800 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:04,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:04,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 90 [2018-10-03 08:52:04,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-03 08:52:04,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-03 08:52:04,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=7314, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:52:04,859 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 91 states. [2018-10-03 08:52:15,514 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-03 08:52:15,786 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-03 08:52:16,053 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-03 08:52:16,293 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-03 08:52:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:18,672 INFO L93 Difference]: Finished difference Result 401 states and 407 transitions. [2018-10-03 08:52:18,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-03 08:52:18,673 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 149 [2018-10-03 08:52:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:18,675 INFO L225 Difference]: With dead ends: 401 [2018-10-03 08:52:18,675 INFO L226 Difference]: Without dead ends: 234 [2018-10-03 08:52:18,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10429 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=3169, Invalid=43703, Unknown=0, NotChecked=0, Total=46872 [2018-10-03 08:52:18,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-03 08:52:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2018-10-03 08:52:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-03 08:52:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-03 08:52:18,710 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2018-10-03 08:52:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:18,710 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-03 08:52:18,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-03 08:52:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-03 08:52:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-03 08:52:18,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:18,711 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-03 08:52:18,711 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:18,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:18,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1380130469, now seen corresponding path program 34 times [2018-10-03 08:52:18,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:18,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:18,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:18,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:18,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:20,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:20,339 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 [2018-10-03 08:52:20,346 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:52:20,374 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:52:20,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:20,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:21,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:21,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 70 [2018-10-03 08:52:21,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:52:21,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:52:21,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4784, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:52:21,683 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 71 states. [2018-10-03 08:52:26,785 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-03 08:52:27,092 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-03 08:52:27,389 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-03 08:52:27,638 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-03 08:52:27,878 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-03 08:52:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:29,895 INFO L93 Difference]: Finished difference Result 334 states and 339 transitions. [2018-10-03 08:52:29,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 08:52:29,895 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 156 [2018-10-03 08:52:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:29,897 INFO L225 Difference]: With dead ends: 334 [2018-10-03 08:52:29,897 INFO L226 Difference]: Without dead ends: 248 [2018-10-03 08:52:29,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=869, Invalid=12241, Unknown=0, NotChecked=0, Total=13110 [2018-10-03 08:52:29,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-03 08:52:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2018-10-03 08:52:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-03 08:52:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-03 08:52:29,925 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2018-10-03 08:52:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:29,926 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-03 08:52:29,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:52:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-03 08:52:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-03 08:52:29,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:29,927 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-03 08:52:29,927 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:29,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:29,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1719166132, now seen corresponding path program 35 times [2018-10-03 08:52:29,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:29,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:29,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:29,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:29,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:31,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:31,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:52:31,226 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:52:31,271 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-03 08:52:31,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:31,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:32,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:32,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-10-03 08:52:32,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:52:32,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:52:32,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=3796, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:52:32,179 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 71 states. [2018-10-03 08:52:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:34,035 INFO L93 Difference]: Finished difference Result 345 states and 349 transitions. [2018-10-03 08:52:34,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:52:34,035 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 160 [2018-10-03 08:52:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:34,037 INFO L225 Difference]: With dead ends: 345 [2018-10-03 08:52:34,037 INFO L226 Difference]: Without dead ends: 166 [2018-10-03 08:52:34,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2048, Invalid=6694, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:52:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-03 08:52:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2018-10-03 08:52:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-03 08:52:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-03 08:52:34,070 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 160 [2018-10-03 08:52:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:34,071 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-03 08:52:34,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:52:34,071 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-03 08:52:34,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-03 08:52:34,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:34,071 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-03 08:52:34,072 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:34,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:34,072 INFO L82 PathProgramCache]: Analyzing trace with hash -148438332, now seen corresponding path program 36 times [2018-10-03 08:52:34,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:34,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:34,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:34,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:34,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:35,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:35,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:52:35,944 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:52:35,990 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-03 08:52:35,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:35,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:37,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:37,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-10-03 08:52:37,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:52:37,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:52:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=5208, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:52:37,406 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 74 states. [2018-10-03 08:52:44,229 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-03 08:52:44,563 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-03 08:52:44,874 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-03 08:52:45,081 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-03 08:52:45,278 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-03 08:52:45,470 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-03 08:52:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:47,513 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2018-10-03 08:52:47,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 08:52:47,514 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 163 [2018-10-03 08:52:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:47,515 INFO L225 Difference]: With dead ends: 349 [2018-10-03 08:52:47,515 INFO L226 Difference]: Without dead ends: 259 [2018-10-03 08:52:47,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=931, Invalid=13349, Unknown=0, NotChecked=0, Total=14280 [2018-10-03 08:52:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-03 08:52:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2018-10-03 08:52:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-03 08:52:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-10-03 08:52:47,547 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2018-10-03 08:52:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:47,547 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-10-03 08:52:47,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:52:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-10-03 08:52:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-03 08:52:47,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:47,548 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-03 08:52:47,548 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:47,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:47,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1550952469, now seen corresponding path program 37 times [2018-10-03 08:52:47,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:47,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:47,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:47,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:52:47,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:48,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:48,927 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 [2018-10-03 08:52:48,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:52:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:48,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:50,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:50,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-10-03 08:52:50,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:52:50,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:52:50,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:52:50,030 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 74 states. [2018-10-03 08:52:51,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:52:51,745 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2018-10-03 08:52:51,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:52:51,745 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 167 [2018-10-03 08:52:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:52:51,746 INFO L225 Difference]: With dead ends: 360 [2018-10-03 08:52:51,747 INFO L226 Difference]: Without dead ends: 173 [2018-10-03 08:52:51,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2221, Invalid=7285, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:52:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-03 08:52:51,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2018-10-03 08:52:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-03 08:52:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-03 08:52:51,778 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-03 08:52:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:52:51,778 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-03 08:52:51,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:52:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-03 08:52:51,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 08:52:51,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:52:51,779 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-03 08:52:51,779 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:52:51,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:52:51,779 INFO L82 PathProgramCache]: Analyzing trace with hash -810935949, now seen corresponding path program 38 times [2018-10-03 08:52:51,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:52:51,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:52:51,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:51,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:52:51,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:52:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:52:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:53,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:52:53,666 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 [2018-10-03 08:52:53,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:52:53,709 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:52:53,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:52:53,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:52:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:52:55,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:52:55,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-10-03 08:52:55,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:52:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:52:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=5650, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:52:55,269 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 77 states. [2018-10-03 08:53:01,688 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-03 08:53:02,031 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-03 08:53:02,366 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-03 08:53:02,600 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-03 08:53:02,823 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-03 08:53:03,036 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-03 08:53:03,238 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-03 08:53:03,464 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-10-03 08:53:03,726 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2018-10-03 08:53:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:05,484 INFO L93 Difference]: Finished difference Result 364 states and 369 transitions. [2018-10-03 08:53:05,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 08:53:05,484 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 170 [2018-10-03 08:53:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:05,486 INFO L225 Difference]: With dead ends: 364 [2018-10-03 08:53:05,486 INFO L226 Difference]: Without dead ends: 270 [2018-10-03 08:53:05,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=995, Invalid=14505, Unknown=0, NotChecked=0, Total=15500 [2018-10-03 08:53:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-03 08:53:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 175. [2018-10-03 08:53:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 08:53:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-03 08:53:05,519 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-03 08:53:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:05,520 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-03 08:53:05,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:53:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-03 08:53:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-03 08:53:05,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:05,520 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-03 08:53:05,521 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:05,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:05,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1036484838, now seen corresponding path program 39 times [2018-10-03 08:53:05,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:05,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:05,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:05,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:05,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:07,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:07,596 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 [2018-10-03 08:53:07,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:07,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-03 08:53:07,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:07,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:09,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:09,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-03 08:53:09,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:53:09,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:53:09,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:53:09,090 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 77 states. [2018-10-03 08:53:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:10,932 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2018-10-03 08:53:10,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:53:10,932 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2018-10-03 08:53:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:10,934 INFO L225 Difference]: With dead ends: 375 [2018-10-03 08:53:10,934 INFO L226 Difference]: Without dead ends: 180 [2018-10-03 08:53:10,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2401, Invalid=7901, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:53:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-03 08:53:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2018-10-03 08:53:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-03 08:53:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-03 08:53:10,968 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 174 [2018-10-03 08:53:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:10,968 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-03 08:53:10,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:53:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-03 08:53:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-03 08:53:10,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:10,969 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-03 08:53:10,969 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:10,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:10,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1003391854, now seen corresponding path program 40 times [2018-10-03 08:53:10,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:10,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:10,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:10,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:10,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:12,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:12,781 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 [2018-10-03 08:53:12,790 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:12,821 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:12,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:12,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:14,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:14,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 79 [2018-10-03 08:53:14,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:53:14,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:53:14,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:53:14,822 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 80 states. [2018-10-03 08:53:21,684 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-03 08:53:22,057 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-03 08:53:22,403 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-03 08:53:22,642 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-10-03 08:53:22,881 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-03 08:53:23,105 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-03 08:53:23,317 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-03 08:53:23,517 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-03 08:53:23,722 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-10-03 08:53:23,950 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2018-10-03 08:53:24,197 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-10-03 08:53:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:25,843 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2018-10-03 08:53:25,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-03 08:53:25,844 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 177 [2018-10-03 08:53:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:25,846 INFO L225 Difference]: With dead ends: 379 [2018-10-03 08:53:25,846 INFO L226 Difference]: Without dead ends: 281 [2018-10-03 08:53:25,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1061, Invalid=15709, Unknown=0, NotChecked=0, Total=16770 [2018-10-03 08:53:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-03 08:53:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2018-10-03 08:53:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-03 08:53:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-03 08:53:25,887 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 177 [2018-10-03 08:53:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:25,887 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-03 08:53:25,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:53:25,887 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-03 08:53:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-03 08:53:25,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:25,888 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-03 08:53:25,888 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:25,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:25,888 INFO L82 PathProgramCache]: Analyzing trace with hash 525284025, now seen corresponding path program 41 times [2018-10-03 08:53:25,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:25,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:25,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:25,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:25,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:27,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:27,339 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 [2018-10-03 08:53:27,347 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:27,395 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-03 08:53:27,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:27,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:28,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:28,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-03 08:53:28,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:53:28,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:53:28,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4837, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:53:28,576 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 80 states. [2018-10-03 08:53:30,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:30,709 INFO L93 Difference]: Finished difference Result 390 states and 394 transitions. [2018-10-03 08:53:30,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:53:30,709 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 181 [2018-10-03 08:53:30,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:30,710 INFO L225 Difference]: With dead ends: 390 [2018-10-03 08:53:30,710 INFO L226 Difference]: Without dead ends: 187 [2018-10-03 08:53:30,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2588, Invalid=8542, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:53:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-03 08:53:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2018-10-03 08:53:30,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-03 08:53:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-03 08:53:30,759 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2018-10-03 08:53:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:30,759 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-03 08:53:30,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:53:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-03 08:53:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-03 08:53:30,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:30,761 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-03 08:53:30,761 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:30,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:30,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1479170495, now seen corresponding path program 42 times [2018-10-03 08:53:30,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:30,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:30,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:30,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:32,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:32,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:32,647 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:32,700 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-03 08:53:32,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:32,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:34,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:34,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-10-03 08:53:34,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:53:34,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:53:34,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=6588, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:53:34,886 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 83 states. [2018-10-03 08:53:42,122 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-10-03 08:53:42,523 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-10-03 08:53:42,907 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-03 08:53:43,167 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-10-03 08:53:43,411 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-10-03 08:53:43,641 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-03 08:53:43,871 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-03 08:53:44,087 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-03 08:53:44,292 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-03 08:53:44,549 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-10-03 08:53:44,787 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2018-10-03 08:53:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:46,611 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2018-10-03 08:53:46,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-03 08:53:46,611 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 184 [2018-10-03 08:53:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:46,613 INFO L225 Difference]: With dead ends: 394 [2018-10-03 08:53:46,613 INFO L226 Difference]: Without dead ends: 292 [2018-10-03 08:53:46,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1129, Invalid=16961, Unknown=0, NotChecked=0, Total=18090 [2018-10-03 08:53:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-03 08:53:46,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 189. [2018-10-03 08:53:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-03 08:53:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-10-03 08:53:46,652 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 184 [2018-10-03 08:53:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:46,652 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-10-03 08:53:46,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:53:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-10-03 08:53:46,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 08:53:46,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:46,653 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-03 08:53:46,654 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:46,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:46,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1293219048, now seen corresponding path program 43 times [2018-10-03 08:53:46,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:46,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:46,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:46,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:48,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:48,391 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 [2018-10-03 08:53:48,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:48,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:49,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:49,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-10-03 08:53:49,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:53:49,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:53:49,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1594, Invalid=5212, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:53:49,913 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 83 states. [2018-10-03 08:53:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:52,102 INFO L93 Difference]: Finished difference Result 405 states and 409 transitions. [2018-10-03 08:53:52,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:53:52,103 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 188 [2018-10-03 08:53:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:52,104 INFO L225 Difference]: With dead ends: 405 [2018-10-03 08:53:52,104 INFO L226 Difference]: Without dead ends: 194 [2018-10-03 08:53:52,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2782, Invalid=9208, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:53:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-03 08:53:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2018-10-03 08:53:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-03 08:53:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2018-10-03 08:53:52,142 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 188 [2018-10-03 08:53:52,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:52,142 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2018-10-03 08:53:52,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:53:52,142 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2018-10-03 08:53:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-03 08:53:52,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:52,143 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-03 08:53:52,143 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:52,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:52,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1734936480, now seen corresponding path program 44 times [2018-10-03 08:53:52,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:52,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:52,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:52,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:52,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:53:52,561 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:53:52,564 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:53:52,565 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:53:52 BoogieIcfgContainer [2018-10-03 08:53:52,565 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:53:52,566 INFO L168 Benchmark]: Toolchain (without parser) took 246231.33 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -116.9 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 335.7 MB). Peak memory consumption was 218.8 MB. Max. memory is 7.1 GB. [2018-10-03 08:53:52,567 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 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. [2018-10-03 08:53:52,567 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.15 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. [2018-10-03 08:53:52,567 INFO L168 Benchmark]: Boogie Preprocessor took 24.32 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. [2018-10-03 08:53:52,568 INFO L168 Benchmark]: RCFGBuilder took 394.48 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. [2018-10-03 08:53:52,568 INFO L168 Benchmark]: TraceAbstraction took 245765.08 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -116.9 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 314.6 MB). Peak memory consumption was 197.7 MB. Max. memory is 7.1 GB. [2018-10-03 08:53:52,571 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 0.18 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 41.15 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 24.32 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 394.48 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 245765.08 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -116.9 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 314.6 MB). Peak memory consumption was 197.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 34]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 34). Cancelled while BasicCegarLoop was analyzing trace of length 192 with TraceHistMax 27, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 23 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 245.7s OverallTime, 48 OverallIterations, 27 TraceHistogramMax, 161.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 850 SDtfs, 4007 SDslu, 22923 SDs, 0 SdLazy, 110933 SolverSat, 1555 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7067 GetRequests, 3621 SyntacticMatches, 18 SemanticMatches, 3428 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72304 ImplicationChecksByTransitivity, 158.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred in iteration=47, 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: 0.8s AutomataMinimizationTime, 47 MinimizatonAttempts, 1377 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 78.8s InterpolantComputationTime, 8814 NumberOfCodeBlocks, 8712 NumberOfCodeBlocksAsserted, 402 NumberOfCheckSat, 8723 ConstructedInterpolants, 0 QuantifiedInterpolants, 8209326 SizeOfPredicates, 140 NumberOfNonLiveVariables, 6387 ConjunctsInSsa, 1892 ConjunctsInUnsatCore, 91 InterpolantComputations, 3 PerfectInterpolantSequences, 22541/74298 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/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-53-52-580.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-53-52-580.csv Completed graceful shutdown