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 0.1.23-1cc990c [2018-09-30 20:21:00,951 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:21:00,954 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:21:00,971 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-30 20:21:01,019 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:21:01,045 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:21:01,045 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:21:01,046 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:21:01,049 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:21:01,050 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:21:01,050 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:21:01,050 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:21:01,050 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:21:01,051 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:21:01,051 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:21:01,051 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:21:01,051 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:21:01,051 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:21:01,051 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:21:01,052 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:21:01,052 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:21:01,052 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:21:01,052 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:21:01,053 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:21:01,053 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:21:01,054 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:21:01,054 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:21:01,054 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:21:01,054 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:21:01,054 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:21:01,054 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:21:01,055 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:21:01,055 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:21:01,055 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:21:01,055 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:21:01,126 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:21:01,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:21:01,143 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:21:01,145 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:21:01,145 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:21:01,146 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-09-30 20:21:01,147 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-09-30 20:21:01,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:21:01,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:21:01,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:21:01,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:21:01,210 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:21:01,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:21:01" (1/1) ... [2018-09-30 20:21:01,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:21:01" (1/1) ... [2018-09-30 20:21:01,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:21:01,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:21:01,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:21:01,253 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:21:01,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:21:01" (1/1) ... [2018-09-30 20:21:01,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:21:01" (1/1) ... [2018-09-30 20:21:01,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:21:01" (1/1) ... [2018-09-30 20:21:01,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:21:01" (1/1) ... [2018-09-30 20:21:01,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:21:01" (1/1) ... [2018-09-30 20:21:01,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:21:01" (1/1) ... [2018-09-30 20:21:01,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:21:01" (1/1) ... [2018-09-30 20:21:01,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:21:01,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:21:01,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:21:01,279 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:21:01,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:21:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:21:01,341 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 20:21:01,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:21:01,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:21:01,568 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:21:01,568 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:21:01 BoogieIcfgContainer [2018-09-30 20:21:01,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:21:01,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:21:01,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:21:01,573 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:21:01,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:21:01" (1/2) ... [2018-09-30 20:21:01,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed811b1 and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:21:01, skipping insertion in model container [2018-09-30 20:21:01,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:21:01" (2/2) ... [2018-09-30 20:21:01,576 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-09-30 20:21:01,586 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:21:01,593 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:21:01,638 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:21:01,639 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:21:01,639 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:21:01,639 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:21:01,639 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:21:01,639 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:21:01,640 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:21:01,640 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:21:01,640 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:21:01,661 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-09-30 20:21:01,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:21:01,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:01,677 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 20:21:01,678 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:01,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:01,686 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-09-30 20:21:01,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:01,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:01,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:01,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:01,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:01,947 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:21:01,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:21:01,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:21:01,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:21:01,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:21:01,969 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-09-30 20:21:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:02,114 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-09-30 20:21:02,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:21:02,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 20:21:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:02,133 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:21:02,133 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:21:02,136 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 [2018-09-30 20:21:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:21:02,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-09-30 20:21:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:21:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-09-30 20:21:02,171 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-09-30 20:21:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:02,171 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-09-30 20:21:02,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:21:02,171 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-09-30 20:21:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:21:02,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:02,172 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:21:02,172 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:02,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:02,173 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-09-30 20:21:02,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:02,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:02,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:02,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:02,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:02,278 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:21:02,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 20:21:02,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:21:02,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:21:02,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:21:02,281 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-09-30 20:21:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:02,410 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-09-30 20:21:02,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:21:02,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-09-30 20:21:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:02,412 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:21:02,412 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:21:02,413 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 [2018-09-30 20:21:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:21:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-30 20:21:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:21:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-09-30 20:21:02,421 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-09-30 20:21:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:02,422 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-09-30 20:21:02,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:21:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-09-30 20:21:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:21:02,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:02,423 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:21:02,423 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:02,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:02,424 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-09-30 20:21:02,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:02,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:02,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:02,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:02,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:21:02,450 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:21:02,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:21:02,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:21:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:21:02,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:21:02,452 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-09-30 20:21:02,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:02,508 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-09-30 20:21:02,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:21:02,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-09-30 20:21:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:02,509 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:21:02,509 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:21:02,510 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 [2018-09-30 20:21:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:21:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-09-30 20:21:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:21:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-30 20:21:02,514 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-30 20:21:02,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:02,514 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-30 20:21:02,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:21:02,515 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-30 20:21:02,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:21:02,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:02,515 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:21:02,516 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:02,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:02,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-09-30 20:21:02,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:02,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:02,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:02,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:02,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:02,804 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-09-30 20:21:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:02,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:02,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:02,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:02,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:03,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:03,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-09-30 20:21:03,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:21:03,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:21:03,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:21:03,062 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-09-30 20:21:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:03,336 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-09-30 20:21:03,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:21:03,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-09-30 20:21:03,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:03,338 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:21:03,339 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:21:03,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:21:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:21:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-09-30 20:21:03,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:21:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 20:21:03,344 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-09-30 20:21:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:03,345 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 20:21:03,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:21:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 20:21:03,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:21:03,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:03,346 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:21:03,347 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:03,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:03,347 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-09-30 20:21:03,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:03,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:03,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:03,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:03,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:03,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:03,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:03,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:03,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:03,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:03,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-09-30 20:21:03,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:21:03,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:21:03,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:21:03,580 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-09-30 20:21:04,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:04,008 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-09-30 20:21:04,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:21:04,009 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:21:04,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:04,010 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:21:04,010 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:21:04,010 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 [2018-09-30 20:21:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:21:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-09-30 20:21:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:21:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-09-30 20:21:04,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-09-30 20:21:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:04,018 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-09-30 20:21:04,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:21:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-09-30 20:21:04,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:21:04,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:04,019 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:21:04,020 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:04,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:04,020 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-09-30 20:21:04,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:04,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:04,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:04,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:04,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:04,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:04,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:04,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:21:04,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:21:04,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:04,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:04,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:04,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 20:21:04,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:21:04,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:21:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:21:04,690 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-09-30 20:21:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:05,474 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-09-30 20:21:05,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:21:05,476 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-09-30 20:21:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:05,477 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:21:05,478 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:21:05,479 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 [2018-09-30 20:21:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:21:05,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-30 20:21:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:21:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-30 20:21:05,484 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-09-30 20:21:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:05,484 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-30 20:21:05,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:21:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-30 20:21:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:21:05,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:05,486 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 20:21:05,486 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:05,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:05,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-09-30 20:21:05,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:05,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:05,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:05,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:05,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:05,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:05,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:05,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:21:05,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:21:05,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:05,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:05,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:05,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-09-30 20:21:05,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:21:05,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:21:05,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:21:05,975 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-09-30 20:21:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:06,463 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-09-30 20:21:06,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:21:06,465 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-09-30 20:21:06,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:06,466 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:21:06,466 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:21:06,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:21:06,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:21:06,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 20:21:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:21:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-30 20:21:06,473 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-09-30 20:21:06,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:06,473 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-30 20:21:06,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:21:06,473 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-30 20:21:06,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:21:06,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:06,474 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 20:21:06,475 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:06,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:06,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-09-30 20:21:06,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:06,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:06,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:06,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:06,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:06,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:06,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:06,606 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:21:06,618 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:21:06,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:06,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:06,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:06,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-09-30 20:21:06,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:21:06,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:21:06,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:21:06,754 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-09-30 20:21:07,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:07,206 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-09-30 20:21:07,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:21:07,207 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-09-30 20:21:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:07,208 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:21:07,208 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:21:07,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:21:07,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:21:07,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-09-30 20:21:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:21:07,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-30 20:21:07,216 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-09-30 20:21:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:07,217 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-30 20:21:07,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:21:07,217 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-30 20:21:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:21:07,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:07,218 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 20:21:07,218 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:07,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-09-30 20:21:07,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:07,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:07,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:07,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:07,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:07,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:07,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:07,476 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:21:07,488 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 20:21:07,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:07,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:07,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:07,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-30 20:21:07,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:21:07,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:21:07,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:21:07,704 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-09-30 20:21:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:08,413 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-09-30 20:21:08,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:21:08,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-09-30 20:21:08,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:08,416 INFO L225 Difference]: With dead ends: 64 [2018-09-30 20:21:08,416 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:21:08,416 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 [2018-09-30 20:21:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:21:08,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-09-30 20:21:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:21:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-30 20:21:08,423 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-09-30 20:21:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:08,423 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-30 20:21:08,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:21:08,423 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-30 20:21:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:21:08,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:08,424 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-30 20:21:08,425 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:08,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:08,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-09-30 20:21:08,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:08,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:08,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:08,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:08,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:08,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:08,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:08,567 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:21:08,596 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 20:21:08,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:08,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:08,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:08,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-30 20:21:08,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:21:08,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:21:08,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:21:08,742 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-09-30 20:21:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:09,074 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-09-30 20:21:09,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:21:09,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-09-30 20:21:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:09,076 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:21:09,076 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:21:09,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:21:09,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:21:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-09-30 20:21:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:21:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-09-30 20:21:09,085 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-09-30 20:21:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:09,085 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-09-30 20:21:09,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:21:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-09-30 20:21:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:21:09,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:09,086 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-30 20:21:09,087 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:09,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:09,087 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-09-30 20:21:09,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:09,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:09,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:09,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:09,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:09,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:09,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:09,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:09,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:09,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:09,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-09-30 20:21:09,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:21:09,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:21:09,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:21:09,957 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-09-30 20:21:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:10,710 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-09-30 20:21:10,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:21:10,711 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-09-30 20:21:10,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:10,712 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:21:10,712 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:21:10,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:21:10,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:21:10,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-09-30 20:21:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:21:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-09-30 20:21:10,721 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-09-30 20:21:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:10,721 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-09-30 20:21:10,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:21:10,722 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-09-30 20:21:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:21:10,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:10,723 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-30 20:21:10,723 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:10,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:10,723 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-09-30 20:21:10,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:10,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:10,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:10,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:10,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:10,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:10,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:10,902 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:21:10,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:21:10,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:10,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:11,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:11,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-09-30 20:21:11,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:21:11,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:21:11,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:21:11,238 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-09-30 20:21:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:11,619 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-09-30 20:21:11,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:21:11,619 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-09-30 20:21:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:11,621 INFO L225 Difference]: With dead ends: 90 [2018-09-30 20:21:11,621 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:21:11,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:21:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:21:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-09-30 20:21:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:21:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-30 20:21:11,629 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-09-30 20:21:11,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:11,629 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-30 20:21:11,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:21:11,629 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-30 20:21:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:21:11,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:11,631 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-30 20:21:11,631 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:11,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:11,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-09-30 20:21:11,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:11,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:11,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:11,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:11,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:11,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:11,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:11,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:21:11,972 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:21:11,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:11,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:12,459 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:12,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-09-30 20:21:12,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:21:12,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:21:12,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:21:12,460 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-09-30 20:21:13,159 WARN L178 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-09-30 20:21:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:16,054 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-09-30 20:21:16,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:21:16,054 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-09-30 20:21:16,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:16,056 INFO L225 Difference]: With dead ends: 116 [2018-09-30 20:21:16,056 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:21:16,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=469, Invalid=3953, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:21:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:21:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-09-30 20:21:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:21:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-30 20:21:16,066 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-09-30 20:21:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:16,066 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-30 20:21:16,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:21:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-30 20:21:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:21:16,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:16,067 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-09-30 20:21:16,068 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:16,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:16,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-09-30 20:21:16,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:16,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:16,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:16,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:16,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:16,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:16,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:16,394 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:21:16,403 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:21:16,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:16,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:16,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:16,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-09-30 20:21:16,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:21:16,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:21:16,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:21:16,667 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-09-30 20:21:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:17,696 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-09-30 20:21:17,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:21:17,696 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-09-30 20:21:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:17,697 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:21:17,698 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:21:17,699 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 [2018-09-30 20:21:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:21:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-09-30 20:21:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:21:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-30 20:21:17,709 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-09-30 20:21:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:17,709 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-30 20:21:17,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:21:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-30 20:21:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 20:21:17,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:17,710 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-30 20:21:17,710 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:17,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-09-30 20:21:17,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:17,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:17,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:17,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:17,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:17,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:17,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:17,932 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:21:17,950 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:21:17,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:17,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:18,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:18,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-09-30 20:21:18,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:21:18,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:21:18,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:21:18,327 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-09-30 20:21:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:18,964 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-09-30 20:21:18,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:21:18,964 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-09-30 20:21:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:18,965 INFO L225 Difference]: With dead ends: 120 [2018-09-30 20:21:18,965 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:21:18,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:21:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:21:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-09-30 20:21:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:21:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-30 20:21:18,975 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-09-30 20:21:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:18,976 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-30 20:21:18,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:21:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-30 20:21:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:21:18,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:18,977 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-30 20:21:18,977 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:18,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:18,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-09-30 20:21:18,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:18,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:18,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:18,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:18,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:19,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:19,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:19,406 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:21:19,428 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:21:19,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:19,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:19,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:19,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-09-30 20:21:19,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:21:19,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:21:19,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:21:19,830 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-09-30 20:21:21,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:21,709 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-09-30 20:21:21,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:21:21,709 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-09-30 20:21:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:21,711 INFO L225 Difference]: With dead ends: 124 [2018-09-30 20:21:21,711 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:21:21,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:21:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:21:21,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-09-30 20:21:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:21:21,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-09-30 20:21:21,723 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-09-30 20:21:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:21,723 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-09-30 20:21:21,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:21:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-09-30 20:21:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:21:21,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:21,725 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-30 20:21:21,725 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:21,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-09-30 20:21:21,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:21,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:21,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:21,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:21,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:22,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:22,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:22,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:22,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:22,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:22,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-30 20:21:22,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:21:22,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:21:22,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:21:22,323 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-09-30 20:21:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:22,767 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-09-30 20:21:22,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:21:22,767 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-09-30 20:21:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:22,768 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:21:22,768 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:21:22,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:21:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:21:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-09-30 20:21:22,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:21:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-30 20:21:22,778 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-09-30 20:21:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:22,778 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-30 20:21:22,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:21:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-30 20:21:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:21:22,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:22,779 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-30 20:21:22,780 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:22,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:22,780 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-09-30 20:21:22,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:22,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:22,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:22,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:22,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:23,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:23,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:23,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:21:23,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:21:23,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:23,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:24,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:24,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-09-30 20:21:24,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:21:24,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:21:24,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:21:24,234 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-09-30 20:21:26,541 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-09-30 20:21:27,723 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2018-09-30 20:21:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:28,618 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-09-30 20:21:28,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:21:28,618 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-09-30 20:21:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:28,619 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:21:28,619 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 20:21:28,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=829, Invalid=8483, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 20:21:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 20:21:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-09-30 20:21:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:21:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-30 20:21:28,631 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-09-30 20:21:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:28,631 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-30 20:21:28,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:21:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-30 20:21:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:21:28,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:28,633 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-09-30 20:21:28,633 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:28,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:28,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-09-30 20:21:28,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:28,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:28,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:28,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:28,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:29,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:29,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:29,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:21:29,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 20:21:29,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:29,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:30,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:30,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-09-30 20:21:30,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:21:30,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:21:30,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:21:30,282 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-09-30 20:21:31,966 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2018-09-30 20:21:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:34,755 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-09-30 20:21:34,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:21:34,755 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-09-30 20:21:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:34,757 INFO L225 Difference]: With dead ends: 192 [2018-09-30 20:21:34,757 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 20:21:34,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2443 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=969, Invalid=10373, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 20:21:34,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 20:21:34,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-09-30 20:21:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:21:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-30 20:21:34,770 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-09-30 20:21:34,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:34,770 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-30 20:21:34,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:21:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-30 20:21:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 20:21:34,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:34,772 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-09-30 20:21:34,772 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:34,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:34,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-09-30 20:21:34,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:34,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:34,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:34,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:34,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:35,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:35,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:35,318 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:21:35,332 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:21:35,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:35,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:35,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:35,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-09-30 20:21:35,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:21:35,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:21:35,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:21:35,738 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-09-30 20:21:38,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:38,132 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-09-30 20:21:38,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:21:38,133 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-09-30 20:21:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:38,134 INFO L225 Difference]: With dead ends: 169 [2018-09-30 20:21:38,134 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 20:21:38,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=319, Invalid=3221, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:21:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 20:21:38,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-09-30 20:21:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:21:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-09-30 20:21:38,147 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-09-30 20:21:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:38,147 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-09-30 20:21:38,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:21:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-09-30 20:21:38,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:21:38,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:38,148 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-30 20:21:38,149 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:38,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:38,149 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-09-30 20:21:38,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:38,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:38,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:38,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:38,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:38,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:38,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:38,496 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:21:38,516 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:21:38,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:38,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:39,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:39,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-09-30 20:21:39,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:21:39,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:21:39,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:21:39,052 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-09-30 20:21:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:39,573 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-09-30 20:21:39,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:21:39,574 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-09-30 20:21:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:39,575 INFO L225 Difference]: With dead ends: 180 [2018-09-30 20:21:39,575 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:21:39,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:21:39,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:21:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-09-30 20:21:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:21:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-09-30 20:21:39,585 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-09-30 20:21:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:39,586 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-09-30 20:21:39,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:21:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-09-30 20:21:39,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:21:39,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:39,587 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-30 20:21:39,587 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:39,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:39,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-09-30 20:21:39,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:39,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:39,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:39,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:39,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:40,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:40,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:40,846 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:21:40,869 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:21:40,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:40,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:41,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:41,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-09-30 20:21:41,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:21:41,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:21:41,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:21:41,332 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-09-30 20:21:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:44,247 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-09-30 20:21:44,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:21:44,249 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-09-30 20:21:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:44,250 INFO L225 Difference]: With dead ends: 184 [2018-09-30 20:21:44,250 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:21:44,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=359, Invalid=3801, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:21:44,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:21:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-09-30 20:21:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:21:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-30 20:21:44,265 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-09-30 20:21:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:44,266 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-30 20:21:44,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:21:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-30 20:21:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:21:44,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:44,267 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-30 20:21:44,267 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:44,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-09-30 20:21:44,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:44,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:44,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:44,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:44,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:44,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:44,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:44,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:44,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:45,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:45,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-30 20:21:45,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:21:45,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:21:45,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:21:45,037 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-09-30 20:21:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:45,609 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-09-30 20:21:45,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:21:45,609 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-09-30 20:21:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:45,610 INFO L225 Difference]: With dead ends: 195 [2018-09-30 20:21:45,610 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:21:45,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=2159, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:21:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:21:45,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-09-30 20:21:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:21:45,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-30 20:21:45,622 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-09-30 20:21:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:45,623 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-30 20:21:45,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:21:45,623 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-30 20:21:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:21:45,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:45,624 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-30 20:21:45,624 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:45,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:45,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-09-30 20:21:45,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:45,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:45,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:45,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:21:45,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:46,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:46,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:46,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:21:46,315 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:21:46,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:46,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:47,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:47,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-09-30 20:21:47,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:21:47,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:21:47,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3030, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:21:47,574 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-09-30 20:21:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:54,233 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-09-30 20:21:54,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:21:54,234 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-09-30 20:21:54,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:54,235 INFO L225 Difference]: With dead ends: 249 [2018-09-30 20:21:54,235 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:21:54,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1449, Invalid=17183, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 20:21:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:21:54,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-09-30 20:21:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:21:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-30 20:21:54,253 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-09-30 20:21:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:54,253 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-30 20:21:54,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:21:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-30 20:21:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:21:54,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:54,254 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-09-30 20:21:54,255 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:54,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:54,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-09-30 20:21:54,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:54,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:54,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:54,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:54,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:55,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:55,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:55,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:21:55,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:21:55,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:55,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:21:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:55,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:21:55,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-09-30 20:21:55,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:21:55,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:21:55,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:21:55,820 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-09-30 20:21:58,077 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2018-09-30 20:21:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:21:59,277 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-09-30 20:21:59,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:21:59,277 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-09-30 20:21:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:21:59,278 INFO L225 Difference]: With dead ends: 214 [2018-09-30 20:21:59,278 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 20:21:59,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=445, Invalid=5105, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:21:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 20:21:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-09-30 20:21:59,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:21:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-30 20:21:59,294 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-09-30 20:21:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:21:59,294 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-30 20:21:59,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:21:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-30 20:21:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:21:59,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:21:59,295 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-30 20:21:59,295 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:21:59,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:21:59,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-09-30 20:21:59,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:21:59,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:21:59,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:59,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:21:59,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:21:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:21:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:21:59,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:21:59,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:21:59,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:21:59,916 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:21:59,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:21:59,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:22:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:00,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:22:00,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-09-30 20:22:00,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:22:00,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:22:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1636, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:22:00,386 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-09-30 20:22:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:22:01,157 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-09-30 20:22:01,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:22:01,157 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-09-30 20:22:01,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:22:01,158 INFO L225 Difference]: With dead ends: 225 [2018-09-30 20:22:01,158 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:22:01,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=916, Invalid=2866, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:22:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:22:01,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-09-30 20:22:01,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:22:01,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-09-30 20:22:01,173 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-09-30 20:22:01,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:22:01,174 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-09-30 20:22:01,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:22:01,174 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-09-30 20:22:01,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:22:01,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:22:01,175 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-30 20:22:01,175 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:22:01,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:22:01,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-09-30 20:22:01,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:22:01,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:22:01,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:01,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:22:01,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:22:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:01,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:22:01,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:22:01,997 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:22:02,028 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 20:22:02,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:22:02,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:22:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:02,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:22:02,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-09-30 20:22:02,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:22:02,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:22:02,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2320, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:22:02,716 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-09-30 20:22:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:22:06,871 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-09-30 20:22:06,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:22:06,877 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-09-30 20:22:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:22:06,878 INFO L225 Difference]: With dead ends: 229 [2018-09-30 20:22:06,878 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 20:22:06,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=491, Invalid=5829, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:22:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 20:22:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-09-30 20:22:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:22:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-30 20:22:06,901 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-09-30 20:22:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:22:06,902 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-30 20:22:06,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:22:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-30 20:22:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:22:06,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:22:06,903 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-30 20:22:06,903 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:22:06,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:22:06,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-09-30 20:22:06,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:22:06,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:22:06,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:06,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:22:06,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:22:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:07,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:22:07,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:22:07,339 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:22:07,368 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:22:07,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:22:07,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:22:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:07,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:22:07,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-09-30 20:22:07,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:22:07,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:22:07,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:22:07,834 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-09-30 20:22:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:22:09,581 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-09-30 20:22:09,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:22:09,582 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-09-30 20:22:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:22:09,583 INFO L225 Difference]: With dead ends: 240 [2018-09-30 20:22:09,583 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 20:22:09,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:22:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 20:22:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-09-30 20:22:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:22:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-30 20:22:09,606 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-09-30 20:22:09,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:22:09,607 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-30 20:22:09,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:22:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-30 20:22:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:22:09,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:22:09,607 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-30 20:22:09,608 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:22:09,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:22:09,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-09-30 20:22:09,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:22:09,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:22:09,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:09,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:22:09,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:22:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:10,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:22:10,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:22:10,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:22:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:22:10,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:22:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:11,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:22:11,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-09-30 20:22:11,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:22:11,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:22:11,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2618, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:22:11,465 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-09-30 20:22:14,664 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2018-09-30 20:22:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:22:16,059 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-09-30 20:22:16,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:22:16,059 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-09-30 20:22:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:22:16,061 INFO L225 Difference]: With dead ends: 244 [2018-09-30 20:22:16,061 INFO L226 Difference]: Without dead ends: 182 [2018-09-30 20:22:16,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=539, Invalid=6601, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 20:22:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-30 20:22:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-09-30 20:22:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:22:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-30 20:22:16,084 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-09-30 20:22:16,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:22:16,084 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-30 20:22:16,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:22:16,084 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-30 20:22:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:22:16,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:22:16,085 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-30 20:22:16,085 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:22:16,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:22:16,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-09-30 20:22:16,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:22:16,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:22:16,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:16,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:22:16,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:22:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:16,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:22:16,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:22:16,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:22:16,742 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:22:16,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:22:16,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:22:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:17,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:22:17,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-30 20:22:17,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:22:17,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:22:17,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:22:17,282 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-09-30 20:22:18,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:22:18,346 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-09-30 20:22:18,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:22:18,347 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-09-30 20:22:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:22:18,348 INFO L225 Difference]: With dead ends: 255 [2018-09-30 20:22:18,348 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 20:22:18,349 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 [2018-09-30 20:22:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 20:22:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-09-30 20:22:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 20:22:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-09-30 20:22:18,366 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-09-30 20:22:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:22:18,366 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-09-30 20:22:18,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:22:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-09-30 20:22:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 20:22:18,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:22:18,367 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-30 20:22:18,367 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:22:18,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:22:18,367 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-09-30 20:22:18,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:22:18,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:22:18,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:18,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:22:18,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:22:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:19,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:22:19,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:22:19,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:22:19,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:22:19,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:22:19,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:22:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:21,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:22:21,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-09-30 20:22:21,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:22:21,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:22:21,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4940, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:22:21,850 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-09-30 20:22:30,165 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2018-09-30 20:22:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:22:31,960 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-09-30 20:22:31,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 20:22:31,960 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-09-30 20:22:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:22:31,962 INFO L225 Difference]: With dead ends: 325 [2018-09-30 20:22:31,962 INFO L226 Difference]: Without dead ends: 190 [2018-09-30 20:22:31,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=2229, Invalid=28923, Unknown=0, NotChecked=0, Total=31152 [2018-09-30 20:22:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-30 20:22:31,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-09-30 20:22:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 20:22:31,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-09-30 20:22:31,984 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-09-30 20:22:31,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:22:31,984 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-09-30 20:22:31,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:22:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-09-30 20:22:31,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:22:31,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:22:31,985 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-09-30 20:22:31,985 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:22:31,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:22:31,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-09-30 20:22:31,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:22:31,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:22:31,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:31,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:22:31,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:22:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:33,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:22:33,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:22:33,063 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:22:33,085 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:22:33,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:22:33,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:22:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:34,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:22:34,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-09-30 20:22:34,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:22:34,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:22:34,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:22:34,002 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-09-30 20:22:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:22:39,782 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-09-30 20:22:39,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:22:39,783 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-09-30 20:22:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:22:39,785 INFO L225 Difference]: With dead ends: 274 [2018-09-30 20:22:39,785 INFO L226 Difference]: Without dead ends: 204 [2018-09-30 20:22:39,786 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 [2018-09-30 20:22:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-09-30 20:22:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-09-30 20:22:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:22:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-30 20:22:39,815 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-09-30 20:22:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:22:39,816 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-30 20:22:39,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:22:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-30 20:22:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:22:39,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:22:39,817 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-09-30 20:22:39,817 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:22:39,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:22:39,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-09-30 20:22:39,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:22:39,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:22:39,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:39,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:22:39,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:22:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:41,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:22:41,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:22:41,105 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:22:41,138 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:22:41,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:22:41,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:22:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:41,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:22:41,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-09-30 20:22:41,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:22:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:22:41,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2604, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:22:41,817 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-09-30 20:22:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:22:42,865 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-09-30 20:22:42,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:22:42,865 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-09-30 20:22:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:22:42,867 INFO L225 Difference]: With dead ends: 285 [2018-09-30 20:22:42,867 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:22:42,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1426, Invalid=4580, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:22:42,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:22:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-09-30 20:22:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:22:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-30 20:22:42,892 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-09-30 20:22:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:22:42,892 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-30 20:22:42,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:22:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-30 20:22:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 20:22:42,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:22:42,893 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-09-30 20:22:42,893 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:22:42,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:22:42,893 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-09-30 20:22:42,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:22:42,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:22:42,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:42,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:22:42,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:22:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 18 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:44,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:22:44,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:22:44,133 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:22:44,175 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 20:22:44,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:22:44,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:22:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 648 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:22:47,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:22:47,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-09-30 20:22:47,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:22:47,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:22:47,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=6069, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:22:47,807 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. [2018-09-30 20:22:57,039 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-09-30 20:22:57,282 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-09-30 20:22:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:22:59,496 INFO L93 Difference]: Finished difference Result 363 states and 369 transitions. [2018-09-30 20:22:59,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 20:22:59,496 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 135 [2018-09-30 20:22:59,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:22:59,498 INFO L225 Difference]: With dead ends: 363 [2018-09-30 20:22:59,499 INFO L226 Difference]: Without dead ends: 212 [2018-09-30 20:22:59,501 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 [2018-09-30 20:22:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-09-30 20:22:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2018-09-30 20:22:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 20:22:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-30 20:22:59,529 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2018-09-30 20:22:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:22:59,529 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-30 20:22:59,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:22:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-30 20:22:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 20:22:59,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:22:59,530 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-09-30 20:22:59,530 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:22:59,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:22:59,531 INFO L82 PathProgramCache]: Analyzing trace with hash 847427031, now seen corresponding path program 31 times [2018-09-30 20:22:59,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:22:59,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:22:59,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:59,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:22:59,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:22:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:23:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:01,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:23:01,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:23:01,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:23:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:23:01,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:23:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:02,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:23:02,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-09-30 20:23:02,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:23:02,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:23:02,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3990, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:23:02,782 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 65 states. [2018-09-30 20:23:07,940 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-09-30 20:23:08,213 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-09-30 20:23:08,475 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-09-30 20:23:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:23:10,396 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2018-09-30 20:23:10,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:23:10,396 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 142 [2018-09-30 20:23:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:23:10,398 INFO L225 Difference]: With dead ends: 304 [2018-09-30 20:23:10,398 INFO L226 Difference]: Without dead ends: 226 [2018-09-30 20:23:10,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=751, Invalid=10169, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 20:23:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-09-30 20:23:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 147. [2018-09-30 20:23:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 20:23:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-09-30 20:23:10,421 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 142 [2018-09-30 20:23:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:23:10,421 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-09-30 20:23:10,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:23:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-09-30 20:23:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:23:10,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:23:10,422 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2018-09-30 20:23:10,422 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:23:10,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:23:10,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1796978306, now seen corresponding path program 32 times [2018-09-30 20:23:10,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:23:10,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:23:10,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:23:10,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:23:10,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:23:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:23:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:11,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:23:11,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:23:11,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:23:11,474 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:23:11,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:23:11,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:23:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:12,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:23:12,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-09-30 20:23:12,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:23:12,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:23:12,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:23:12,396 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 65 states. [2018-09-30 20:23:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:23:13,753 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2018-09-30 20:23:13,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:23:13,753 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2018-09-30 20:23:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:23:13,755 INFO L225 Difference]: With dead ends: 315 [2018-09-30 20:23:13,755 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 20:23:13,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1723, Invalid=5587, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:23:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 20:23:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2018-09-30 20:23:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 20:23:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-09-30 20:23:13,787 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 146 [2018-09-30 20:23:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:23:13,787 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-09-30 20:23:13,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:23:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-09-30 20:23:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 20:23:13,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:23:13,789 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-09-30 20:23:13,789 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:23:13,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:23:13,789 INFO L82 PathProgramCache]: Analyzing trace with hash -193355018, now seen corresponding path program 33 times [2018-09-30 20:23:13,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:23:13,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:23:13,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:23:13,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:23:13,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:23:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:23:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 20 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:15,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:23:15,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:23:15,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:23:15,070 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:23:15,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:23:15,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:23:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 800 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:18,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:23:18,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 90 [2018-09-30 20:23:18,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 20:23:18,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 20:23:18,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=7314, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 20:23:18,149 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 91 states. [2018-09-30 20:23:28,954 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-09-30 20:23:29,235 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-09-30 20:23:29,514 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-09-30 20:23:29,746 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 20:23:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:23:32,234 INFO L93 Difference]: Finished difference Result 401 states and 407 transitions. [2018-09-30 20:23:32,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 20:23:32,235 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 149 [2018-09-30 20:23:32,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:23:32,237 INFO L225 Difference]: With dead ends: 401 [2018-09-30 20:23:32,237 INFO L226 Difference]: Without dead ends: 234 [2018-09-30 20:23:32,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10429 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=3169, Invalid=43703, Unknown=0, NotChecked=0, Total=46872 [2018-09-30 20:23:32,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-09-30 20:23:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2018-09-30 20:23:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 20:23:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-30 20:23:32,275 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2018-09-30 20:23:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:23:32,276 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-30 20:23:32,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 20:23:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-30 20:23:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 20:23:32,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:23:32,277 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-09-30 20:23:32,277 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:23:32,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:23:32,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1380130469, now seen corresponding path program 34 times [2018-09-30 20:23:32,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:23:32,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:23:32,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:23:32,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:23:32,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:23:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:23:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:33,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:23:33,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:23:33,895 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:23:33,920 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:23:33,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:23:33,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:23:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:35,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:23:35,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 70 [2018-09-30 20:23:35,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:23:35,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:23:35,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4784, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:23:35,257 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 71 states. [2018-09-30 20:23:40,409 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-09-30 20:23:40,725 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-09-30 20:23:41,028 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-09-30 20:23:41,220 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 20:23:41,405 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 20:23:41,596 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-09-30 20:23:41,796 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2018-09-30 20:23:42,012 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-09-30 20:23:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:23:43,470 INFO L93 Difference]: Finished difference Result 334 states and 339 transitions. [2018-09-30 20:23:43,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:23:43,471 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 156 [2018-09-30 20:23:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:23:43,472 INFO L225 Difference]: With dead ends: 334 [2018-09-30 20:23:43,472 INFO L226 Difference]: Without dead ends: 248 [2018-09-30 20:23:43,473 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 [2018-09-30 20:23:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-09-30 20:23:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2018-09-30 20:23:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 20:23:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-30 20:23:43,504 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2018-09-30 20:23:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:23:43,504 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-30 20:23:43,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:23:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-30 20:23:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 20:23:43,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:23:43,505 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2018-09-30 20:23:43,506 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:23:43,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:23:43,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1719166132, now seen corresponding path program 35 times [2018-09-30 20:23:43,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:23:43,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:23:43,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:23:43,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:23:43,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:23:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:23:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:44,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:23:44,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:23:44,405 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:23:44,445 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-09-30 20:23:44,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:23:44,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:23:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:47,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:23:47,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-09-30 20:23:47,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:23:47,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:23:47,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=3796, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:23:47,218 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 71 states. [2018-09-30 20:23:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:23:48,833 INFO L93 Difference]: Finished difference Result 345 states and 349 transitions. [2018-09-30 20:23:48,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:23:48,833 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 160 [2018-09-30 20:23:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:23:48,835 INFO L225 Difference]: With dead ends: 345 [2018-09-30 20:23:48,835 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 20:23:48,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2048, Invalid=6694, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:23:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 20:23:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2018-09-30 20:23:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 20:23:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-09-30 20:23:48,863 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 160 [2018-09-30 20:23:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:23:48,863 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-09-30 20:23:48,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:23:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-09-30 20:23:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 20:23:48,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:23:48,864 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-09-30 20:23:48,864 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:23:48,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:23:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash -148438332, now seen corresponding path program 36 times [2018-09-30 20:23:48,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:23:48,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:23:48,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:23:48,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:23:48,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:23:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:23:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:50,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:23:50,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:23:50,846 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:23:50,891 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-09-30 20:23:50,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:23:50,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:23:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:23:52,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:23:52,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-09-30 20:23:52,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:23:52,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:23:52,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=5208, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:23:52,597 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 74 states. [2018-09-30 20:23:59,166 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-09-30 20:23:59,490 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-09-30 20:23:59,795 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-09-30 20:23:59,999 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 20:24:00,199 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 20:24:00,386 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 20:24:02,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:02,655 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2018-09-30 20:24:02,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:24:02,655 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 163 [2018-09-30 20:24:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:02,657 INFO L225 Difference]: With dead ends: 349 [2018-09-30 20:24:02,657 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 20:24:02,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=931, Invalid=13349, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 20:24:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 20:24:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2018-09-30 20:24:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-09-30 20:24:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-09-30 20:24:02,695 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2018-09-30 20:24:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:02,695 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-09-30 20:24:02,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:24:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-09-30 20:24:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 20:24:02,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:02,696 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2018-09-30 20:24:02,696 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:02,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1550952469, now seen corresponding path program 37 times [2018-09-30 20:24:02,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:02,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:02,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:02,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:02,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:03,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:03,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:03,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:03,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:04,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:04,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-09-30 20:24:04,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:24:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:24:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:24:04,677 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 74 states. [2018-09-30 20:24:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:06,406 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2018-09-30 20:24:06,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:24:06,406 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 167 [2018-09-30 20:24:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:06,407 INFO L225 Difference]: With dead ends: 360 [2018-09-30 20:24:06,407 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 20:24:06,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2221, Invalid=7285, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:24:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 20:24:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2018-09-30 20:24:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 20:24:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-30 20:24:06,439 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-09-30 20:24:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:06,440 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-30 20:24:06,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:24:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-30 20:24:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 20:24:06,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:06,441 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-09-30 20:24:06,441 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:06,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash -810935949, now seen corresponding path program 38 times [2018-09-30 20:24:06,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:06,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:06,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:06,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:24:06,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:08,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:08,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:08,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:24:08,277 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:24:08,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:08,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:09,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:09,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-09-30 20:24:09,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:24:09,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:24:09,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=5650, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:24:09,836 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 77 states. [2018-09-30 20:24:16,312 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-09-30 20:24:16,671 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-09-30 20:24:17,028 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-09-30 20:24:17,253 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 20:24:17,515 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 20:24:17,768 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 20:24:17,971 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 20:24:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:20,118 INFO L93 Difference]: Finished difference Result 364 states and 369 transitions. [2018-09-30 20:24:20,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 20:24:20,118 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 170 [2018-09-30 20:24:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:20,119 INFO L225 Difference]: With dead ends: 364 [2018-09-30 20:24:20,119 INFO L226 Difference]: Without dead ends: 270 [2018-09-30 20:24:20,120 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 [2018-09-30 20:24:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-09-30 20:24:20,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 175. [2018-09-30 20:24:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 20:24:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-30 20:24:20,152 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-09-30 20:24:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:20,153 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-30 20:24:20,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:24:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-30 20:24:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 20:24:20,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:20,154 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1] [2018-09-30 20:24:20,154 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:20,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:20,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1036484838, now seen corresponding path program 39 times [2018-09-30 20:24:20,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:20,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:20,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:20,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:20,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:21,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:21,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:21,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:24:21,325 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-30 20:24:21,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:21,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:22,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:22,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-09-30 20:24:22,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:24:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:24:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:24:22,444 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 77 states. [2018-09-30 20:24:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:24,536 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2018-09-30 20:24:24,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:24:24,536 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2018-09-30 20:24:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:24,538 INFO L225 Difference]: With dead ends: 375 [2018-09-30 20:24:24,538 INFO L226 Difference]: Without dead ends: 180 [2018-09-30 20:24:24,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2401, Invalid=7901, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:24:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-09-30 20:24:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2018-09-30 20:24:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-30 20:24:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-09-30 20:24:24,573 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 174 [2018-09-30 20:24:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:24,573 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-09-30 20:24:24,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:24:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-09-30 20:24:24,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-09-30 20:24:24,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:24,574 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-09-30 20:24:24,574 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:24,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:24,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1003391854, now seen corresponding path program 40 times [2018-09-30 20:24:24,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:24,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:24,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:24,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:24,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:26,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:26,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:26,348 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:24:26,381 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:24:26,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:26,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:28,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:28,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 79 [2018-09-30 20:24:28,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:24:28,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:24:28,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:24:28,207 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 80 states. [2018-09-30 20:24:35,035 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-09-30 20:24:35,389 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-09-30 20:24:35,735 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-09-30 20:24:35,975 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 20:24:36,201 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 20:24:36,419 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 20:24:36,627 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 20:24:36,829 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 20:24:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:39,150 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2018-09-30 20:24:39,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 20:24:39,151 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 177 [2018-09-30 20:24:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:39,152 INFO L225 Difference]: With dead ends: 379 [2018-09-30 20:24:39,153 INFO L226 Difference]: Without dead ends: 281 [2018-09-30 20:24:39,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1061, Invalid=15709, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 20:24:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-09-30 20:24:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2018-09-30 20:24:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-30 20:24:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-09-30 20:24:39,189 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 177 [2018-09-30 20:24:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:39,189 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-09-30 20:24:39,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:24:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-09-30 20:24:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-09-30 20:24:39,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:39,190 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1] [2018-09-30 20:24:39,190 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:39,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash 525284025, now seen corresponding path program 41 times [2018-09-30 20:24:39,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:39,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:39,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:39,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:39,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:40,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:40,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:40,843 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:24:40,886 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-30 20:24:40,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:40,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:42,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:42,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-09-30 20:24:42,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:24:42,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:24:42,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4837, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:24:42,031 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 80 states. [2018-09-30 20:24:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:24:44,223 INFO L93 Difference]: Finished difference Result 390 states and 394 transitions. [2018-09-30 20:24:44,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:24:44,224 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 181 [2018-09-30 20:24:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:24:44,225 INFO L225 Difference]: With dead ends: 390 [2018-09-30 20:24:44,225 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 20:24:44,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2588, Invalid=8542, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:24:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 20:24:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2018-09-30 20:24:44,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 20:24:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-30 20:24:44,275 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2018-09-30 20:24:44,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:24:44,275 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-30 20:24:44,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:24:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-30 20:24:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 20:24:44,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:24:44,276 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-09-30 20:24:44,277 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:24:44,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:24:44,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1479170495, now seen corresponding path program 42 times [2018-09-30 20:24:44,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:24:44,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:24:44,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:24:44,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:24:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:24:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:46,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:24:46,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:24:46,088 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:24:46,140 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-09-30 20:24:46,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:24:46,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:24:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:24:48,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:24:48,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-09-30 20:24:48,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:24:48,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:24:48,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=6588, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:24:48,101 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 83 states. [2018-09-30 20:24:55,472 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-09-30 20:24:55,876 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-09-30 20:24:56,253 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-09-30 20:24:56,512 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-09-30 20:24:56,763 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-09-30 20:24:57,007 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-09-30 20:24:57,244 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-09-30 20:24:57,463 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-30 20:24:57,681 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-09-30 20:24:57,888 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-09-30 20:24:58,486 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2018-09-30 20:24:58,730 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2018-09-30 20:25:00,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:00,003 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2018-09-30 20:25:00,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 20:25:00,003 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 184 [2018-09-30 20:25:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:00,005 INFO L225 Difference]: With dead ends: 394 [2018-09-30 20:25:00,005 INFO L226 Difference]: Without dead ends: 292 [2018-09-30 20:25:00,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1129, Invalid=16961, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 20:25:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-09-30 20:25:00,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 189. [2018-09-30 20:25:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 20:25:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-09-30 20:25:00,043 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 184 [2018-09-30 20:25:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:00,043 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-09-30 20:25:00,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:25:00,043 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-09-30 20:25:00,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 20:25:00,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:00,044 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2018-09-30 20:25:00,044 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:00,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1293219048, now seen corresponding path program 43 times [2018-09-30 20:25:00,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:00,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:00,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:00,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:25:00,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:01,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:25:01,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:25:01,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:25:01,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:25:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:25:03,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:25:03,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-09-30 20:25:03,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:25:03,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:25:03,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1594, Invalid=5212, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:25:03,210 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 83 states. [2018-09-30 20:25:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:25:05,601 INFO L93 Difference]: Finished difference Result 405 states and 409 transitions. [2018-09-30 20:25:05,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:25:05,601 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 188 [2018-09-30 20:25:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:25:05,602 INFO L225 Difference]: With dead ends: 405 [2018-09-30 20:25:05,602 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 20:25:05,603 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 [2018-09-30 20:25:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 20:25:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2018-09-30 20:25:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-09-30 20:25:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2018-09-30 20:25:05,640 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 188 [2018-09-30 20:25:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:25:05,640 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2018-09-30 20:25:05,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:25:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2018-09-30 20:25:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-30 20:25:05,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:25:05,641 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-09-30 20:25:05,641 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:25:05,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:25:05,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1734936480, now seen corresponding path program 44 times [2018-09-30 20:25:05,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:25:05,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:25:05,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:25:05,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:25:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 20:25:07,075 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:25:07,079 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:25:07,079 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:25:07 BoogieIcfgContainer [2018-09-30 20:25:07,079 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:25:07,080 INFO L168 Benchmark]: Toolchain (without parser) took 245875.63 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -47.2 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 291.8 MB). Peak memory consumption was 244.6 MB. Max. memory is 7.1 GB. [2018-09-30 20:25:07,081 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:25:07,082 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.56 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:25:07,082 INFO L168 Benchmark]: Boogie Preprocessor took 25.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:25:07,082 INFO L168 Benchmark]: RCFGBuilder took 290.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:25:07,083 INFO L168 Benchmark]: TraceAbstraction took 245510.04 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -47.2 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 270.6 MB). Peak memory consumption was 223.5 MB. Max. memory is 7.1 GB. [2018-09-30 20:25:07,085 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 0.19 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 42.56 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.55 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 290.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 245510.04 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -47.2 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 270.6 MB). Peak memory consumption was 223.5 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 50 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 245.4s OverallTime, 48 OverallIterations, 27 TraceHistogramMax, 163.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 850 SDtfs, 4007 SDslu, 22923 SDs, 0 SdLazy, 110933 SolverSat, 1555 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7067 GetRequests, 3621 SyntacticMatches, 18 SemanticMatches, 3428 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72304 ImplicationChecksByTransitivity, 155.9s 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, 75.5s 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-0-2018-09-30_20-25-07-095.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-25-07-095.csv Completed graceful shutdown