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/20170304-DifficultPathPrograms/simple1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:28:11,073 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:28:11,075 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:28:11,088 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:28:11,088 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:28:11,089 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:28:11,091 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:28:11,093 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:28:11,094 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:28:11,095 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:28:11,096 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 12:28:11,097 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 12:28:11,098 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 12:28:11,099 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 12:28:11,100 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 12:28:11,101 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 12:28:11,102 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 12:28:11,104 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 12:28:11,106 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 12:28:11,108 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 12:28:11,109 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 12:28:11,111 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 12:28:11,114 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 12:28:11,124 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 12:28:11,139 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:28:11,140 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:28:11,141 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:28:11,141 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:28:11,142 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:28:11,142 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:28:11,142 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:28:11,142 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:28:11,143 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:28:11,143 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:28:11,143 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:28:11,143 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:28:11,143 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:28:11,144 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:28:11,144 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:28:11,144 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:28:11,144 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:28:11,144 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:28:11,145 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:28:11,145 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:28:11,145 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:28:11,145 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:28:11,145 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:28:11,146 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:28:11,146 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:28:11,146 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:28:11,146 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:28:11,146 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:28:11,147 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:28:11,147 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:28:11,192 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:28:11,206 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:28:11,210 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:28:11,212 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:28:11,213 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:28:11,214 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl [2018-10-04 12:28:11,214 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl' [2018-10-04 12:28:11,269 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:28:11,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:28:11,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:28:11,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:28:11,272 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:28:11,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:11" (1/1) ... [2018-10-04 12:28:11,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:11" (1/1) ... [2018-10-04 12:28:11,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:28:11,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:28:11,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:28:11,317 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:28:11,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:11" (1/1) ... [2018-10-04 12:28:11,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:11" (1/1) ... [2018-10-04 12:28:11,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:11" (1/1) ... [2018-10-04 12:28:11,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:11" (1/1) ... [2018-10-04 12:28:11,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:11" (1/1) ... [2018-10-04 12:28:11,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:11" (1/1) ... [2018-10-04 12:28:11,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:11" (1/1) ... [2018-10-04 12:28:11,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:28:11,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:28:11,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:28:11,339 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:28:11,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:28:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:28:11,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:28:11,626 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:28:11,627 INFO L202 PluginConnector]: Adding new model simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:28:11 BoogieIcfgContainer [2018-10-04 12:28:11,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:28:11,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:28:11,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:28:11,631 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:28:11,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:11" (1/2) ... [2018-10-04 12:28:11,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fc52 and model type simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:28:11, skipping insertion in model container [2018-10-04 12:28:11,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:28:11" (2/2) ... [2018-10-04 12:28:11,635 INFO L112 eAbstractionObserver]: Analyzing ICFG simple1.i_3.bpl [2018-10-04 12:28:11,645 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:28:11,657 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:28:11,713 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:28:11,714 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:28:11,714 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:28:11,714 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:28:11,714 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:28:11,715 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:28:11,715 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:28:11,715 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:28:11,715 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:28:11,737 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 12:28:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:28:11,753 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:11,756 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:28:11,757 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:11,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 12:28:11,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:11,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:11,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:11,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:11,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:11,977 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:28:11,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:28:11,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:28:11,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:28:11,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:28:11,998 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 12:28:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:12,057 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 12:28:12,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:28:12,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 12:28:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:12,072 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:28:12,073 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:28:12,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:28:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:28:12,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:28:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:28:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:28:12,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 12:28:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:12,113 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:28:12,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:28:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:28:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:28:12,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:12,114 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 12:28:12,114 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:12,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:12,114 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 12:28:12,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:12,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:12,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:12,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:12,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:12,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:12,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:12,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:12,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:12,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:12,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:28:12,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:28:12,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:28:12,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:28:12,467 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-04 12:28:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:12,579 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:28:12,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:28:12,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:28:12,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:12,581 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:28:12,581 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:28:12,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:28:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:28:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:28:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:28:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:28:12,586 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 12:28:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:12,586 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:28:12,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:28:12,586 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:28:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:28:12,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:12,587 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 12:28:12,587 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:12,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:12,588 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-04 12:28:12,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:12,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:12,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:12,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:12,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:12,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:12,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:12,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:28:12,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:28:12,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:12,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:12,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:12,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:28:12,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:28:12,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:28:12,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:28:12,920 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-04 12:28:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:12,975 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:28:12,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:28:12,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:28:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:12,978 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:28:12,978 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:28:12,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:28:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:28:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:28:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:28:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:28:12,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 12:28:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:12,987 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:28:12,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:28:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:28:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:28:12,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:12,988 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 12:28:12,989 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:12,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:12,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-04 12:28:12,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:12,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:12,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:12,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:12,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:13,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:13,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:13,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:28:13,323 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:28:13,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:13,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:13,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:13,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:28:13,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:28:13,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:28:13,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:28:13,424 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-04 12:28:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:13,504 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:28:13,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:28:13,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 12:28:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:13,506 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:28:13,507 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:28:13,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:28:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:28:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:28:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:28:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:28:13,515 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 12:28:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:13,516 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:28:13,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:28:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:28:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:28:13,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:13,517 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 12:28:13,517 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:13,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-04 12:28:13,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:13,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:13,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:13,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:13,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:13,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:13,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:13,691 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:28:13,700 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:28:13,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:13,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:13,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:13,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:28:13,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:28:13,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:28:13,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:28:13,768 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-04 12:28:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:13,927 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:28:13,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:28:13,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 12:28:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:13,929 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:28:13,930 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:28:13,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:28:13,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:28:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:28:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:28:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:28:13,936 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 12:28:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:13,936 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:28:13,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:28:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:28:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:28:13,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:13,937 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 12:28:13,938 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:13,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:13,938 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-04 12:28:13,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:13,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:13,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:13,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:13,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:14,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:14,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:14,128 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:28:14,182 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:28:14,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:14,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:14,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:14,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:28:14,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:28:14,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:28:14,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:28:14,274 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-04 12:28:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:14,368 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:28:14,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:28:14,370 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 12:28:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:14,371 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:28:14,371 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:28:14,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:28:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:28:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:28:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:28:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:28:14,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 12:28:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:14,377 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:28:14,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:28:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:28:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:28:14,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:14,378 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 12:28:14,378 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:14,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:14,379 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-04 12:28:14,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:14,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:14,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:14,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:14,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:14,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:14,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:14,966 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:28:15,002 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:28:15,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:15,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:15,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:15,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:28:15,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:28:15,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:28:15,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:28:15,072 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-04 12:28:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:15,180 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:28:15,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:28:15,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 12:28:15,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:15,184 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:28:15,184 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:28:15,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:28:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:28:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:28:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:28:15,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:28:15,189 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 12:28:15,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:15,190 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:28:15,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:28:15,190 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:28:15,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:28:15,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:15,191 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 12:28:15,191 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:15,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:15,191 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-04 12:28:15,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:15,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:15,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:15,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:15,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:15,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:15,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:15,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:15,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:15,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:15,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:28:15,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:28:15,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:28:15,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:28:15,497 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-04 12:28:15,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:15,599 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:28:15,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:28:15,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 12:28:15,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:15,601 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:28:15,601 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:28:15,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:28:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:28:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:28:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:28:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:28:15,607 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 12:28:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:15,607 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:28:15,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:28:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:28:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:28:15,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:15,609 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 12:28:15,609 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:15,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:15,609 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-04 12:28:15,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:15,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:15,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:15,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:15,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:15,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:15,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:15,895 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:28:15,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:28:15,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:15,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:15,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:15,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:28:15,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:28:15,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:28:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:28:15,956 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-04 12:28:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:16,104 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:28:16,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:28:16,105 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 12:28:16,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:16,106 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:28:16,106 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:28:16,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:28:16,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:28:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:28:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:28:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:28:16,113 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 12:28:16,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:16,113 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:28:16,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:28:16,113 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:28:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:28:16,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:16,114 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 12:28:16,115 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:16,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:16,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-04 12:28:16,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:16,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:16,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:16,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:16,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:16,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:16,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:16,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:28:16,601 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:28:16,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:16,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:16,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:16,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:28:16,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:28:16,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:28:16,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:28:16,647 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-04 12:28:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:16,778 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:28:16,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:28:16,779 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 12:28:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:16,780 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:28:16,780 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:28:16,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:28:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:28:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:28:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:28:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:28:16,786 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 12:28:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:16,787 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:28:16,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:28:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:28:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:28:16,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:16,788 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-04 12:28:16,788 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:16,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-04 12:28:16,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:16,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:16,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:16,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:16,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:17,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:17,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:17,464 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:28:17,478 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:28:17,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:17,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:17,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:17,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:28:17,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:28:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:28:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:28:17,526 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-04 12:28:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:17,800 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:28:17,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:28:17,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 12:28:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:17,802 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:28:17,803 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:28:17,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:28:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:28:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:28:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:28:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:28:17,809 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 12:28:17,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:17,810 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:28:17,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:28:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:28:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:28:17,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:17,811 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 12:28:17,812 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:17,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:17,812 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-04 12:28:17,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:17,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:17,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:17,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:17,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:18,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:18,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:18,230 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:29:58,244 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:29:58,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:10,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:10,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:10,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:30:10,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:30:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:30:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:30:10,207 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-04 12:30:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:10,351 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:30:10,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:30:10,353 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 12:30:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:10,354 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:30:10,354 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:30:10,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:30:10,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:30:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:30:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:30:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:30:10,360 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 12:30:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:10,360 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:30:10,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:30:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:30:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:30:10,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:10,361 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-04 12:30:10,361 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:10,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:10,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-04 12:30:10,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:10,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:10,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:10,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:10,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:10,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:10,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:10,707 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:30:19,326 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:30:19,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:19,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:19,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:19,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:30:19,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:30:19,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:30:19,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:30:19,398 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-04 12:30:19,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:19,646 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:30:19,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:30:19,647 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 12:30:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:19,648 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:30:19,648 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:30:19,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:30:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:30:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:30:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:30:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:30:19,654 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 12:30:19,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:19,655 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:30:19,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:30:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:30:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:30:19,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:19,656 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 12:30:19,656 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:19,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:19,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-04 12:30:19,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:19,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:19,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:19,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:19,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:20,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:20,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:20,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:20,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:20,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:20,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:30:20,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:30:20,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:30:20,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:30:20,337 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-04 12:30:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:20,511 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:30:20,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:30:20,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 12:30:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:20,513 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:30:20,513 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:30:20,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:30:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:30:20,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:30:20,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:30:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:30:20,522 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 12:30:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:20,523 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:30:20,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:30:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:30:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:30:20,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:20,524 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-04 12:30:20,525 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:20,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:20,525 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-04 12:30:20,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:20,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:20,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:20,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:20,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:21,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:21,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:21,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:30:21,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:30:21,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:21,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:21,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:21,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:30:21,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:30:21,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:30:21,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:30:21,241 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-04 12:30:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:21,572 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:30:21,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:30:21,573 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 12:30:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:21,574 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:30:21,574 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:30:21,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:30:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:30:21,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:30:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:30:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:30:21,581 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 12:30:21,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:21,581 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:30:21,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:30:21,581 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:30:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:30:21,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:21,582 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 12:30:21,583 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:21,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:21,583 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-04 12:30:21,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:21,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:21,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:21,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:21,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:21,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:21,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:21,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:31:06,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 12:31:06,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:07,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:07,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:07,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:31:07,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:31:07,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:31:07,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:31:07,470 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-04 12:31:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:07,787 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:31:07,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:31:07,788 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 12:31:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:07,788 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:31:07,788 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:31:07,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:31:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:31:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:31:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:31:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:31:07,794 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-04 12:31:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:07,794 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:31:07,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:31:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:31:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:31:07,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:07,795 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-04 12:31:07,796 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:07,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:07,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-04 12:31:07,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:07,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:07,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:07,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:07,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:08,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:08,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:08,230 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:08,241 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:08,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:08,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:08,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:08,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:31:08,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:31:08,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:31:08,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:31:08,297 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-04 12:31:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:08,551 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:31:08,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:31:08,558 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 12:31:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:08,558 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:31:08,559 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:31:08,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:31:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:31:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:31:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:31:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:31:08,566 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-04 12:31:08,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:08,566 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:31:08,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:31:08,566 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:31:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:31:08,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:08,568 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-04 12:31:08,568 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:08,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:08,568 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-04 12:31:08,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:08,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:08,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:08,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:08,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:09,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:09,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:09,027 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown