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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 12:13:11,097 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:13:11,099 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:13:11,117 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 12:13:11,117 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 12:13:11,118 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 12:13:11,120 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 12:13:11,121 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 12:13:11,123 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 12:13:11,124 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 12:13:11,125 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 12:13:11,125 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 12:13:11,126 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 12:13:11,127 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 12:13:11,128 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 12:13:11,129 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 12:13:11,130 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 12:13:11,132 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 12:13:11,134 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 12:13:11,135 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 12:13:11,136 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 12:13:11,138 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 12:13:11,140 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-02 12:13:11,149 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-02 12:13:11,164 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:13:11,164 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:13:11,165 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:13:11,165 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:13:11,166 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:13:11,166 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:13:11,166 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:13:11,166 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:13:11,167 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:13:11,167 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:13:11,167 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:13:11,167 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:13:11,167 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:13:11,167 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:13:11,168 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:13:11,168 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:13:11,168 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:13:11,168 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:13:11,168 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:13:11,169 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:13:11,169 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:13:11,169 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:13:11,169 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:13:11,169 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:13:11,170 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:13:11,170 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:13:11,170 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:13:11,170 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:13:11,170 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:13:11,171 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:13:11,171 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:13:11,212 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:13:11,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:13:11,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:13:11,230 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:13:11,230 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:13:11,231 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl [2018-10-02 12:13:11,231 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl' [2018-10-02 12:13:11,283 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:13:11,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:13:11,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:13:11,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:13:11,288 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:13:11,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:11" (1/1) ... [2018-10-02 12:13:11,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:11" (1/1) ... [2018-10-02 12:13:11,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:13:11,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:13:11,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:13:11,330 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:13:11,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:11" (1/1) ... [2018-10-02 12:13:11,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:11" (1/1) ... [2018-10-02 12:13:11,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:11" (1/1) ... [2018-10-02 12:13:11,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:11" (1/1) ... [2018-10-02 12:13:11,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:11" (1/1) ... [2018-10-02 12:13:11,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:11" (1/1) ... [2018-10-02 12:13:11,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:11" (1/1) ... [2018-10-02 12:13:11,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:13:11,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:13:11,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:13:11,353 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:13:11,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:11" (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 [2018-10-02 12:13:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 12:13:11,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 12:13:11,657 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 12:13:11,658 INFO L202 PluginConnector]: Adding new model jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:13:11 BoogieIcfgContainer [2018-10-02 12:13:11,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:13:11,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:13:11,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:13:11,665 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:13:11,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:11" (1/2) ... [2018-10-02 12:13:11,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f250fe and model type jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:13:11, skipping insertion in model container [2018-10-02 12:13:11,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:13:11" (2/2) ... [2018-10-02 12:13:11,669 INFO L112 eAbstractionObserver]: Analyzing ICFG jain_5.i_2.bpl [2018-10-02 12:13:11,679 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:13:11,690 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:13:11,744 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:13:11,745 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:13:11,745 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:13:11,745 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:13:11,745 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:13:11,745 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:13:11,746 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:13:11,746 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:13:11,746 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:13:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 12:13:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 12:13:11,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:11,770 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 12:13:11,771 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:11,777 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:11,778 INFO L82 PathProgramCache]: Analyzing trace with hash 925701, now seen corresponding path program 1 times [2018-10-02 12:13:11,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:11,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:11,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:11,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:13:11,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:12,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:13:12,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 12:13:12,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 12:13:12,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 12:13:12,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:12,071 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2018-10-02 12:13:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:12,344 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-10-02 12:13:12,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 12:13:12,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-02 12:13:12,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:12,366 INFO L225 Difference]: With dead ends: 12 [2018-10-02 12:13:12,366 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 12:13:12,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:13:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 12:13:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-10-02 12:13:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 12:13:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 12:13:12,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-02 12:13:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:12,415 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 12:13:12,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 12:13:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 12:13:12,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 12:13:12,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:12,416 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-02 12:13:12,417 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:12,417 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:12,417 INFO L82 PathProgramCache]: Analyzing trace with hash 889531649, now seen corresponding path program 1 times [2018-10-02 12:13:12,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:12,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:12,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:12,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:13:12,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:12,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:12,551 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 [2018-10-02 12:13:12,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:13:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:12,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:12,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:12,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-02 12:13:12,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:13:12,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:13:12,790 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:12,790 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 10 states. [2018-10-02 12:13:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:13,381 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-02 12:13:13,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:13:13,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-10-02 12:13:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:13,382 INFO L225 Difference]: With dead ends: 12 [2018-10-02 12:13:13,383 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 12:13:13,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:13:13,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 12:13:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-10-02 12:13:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 12:13:13,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 12:13:13,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-02 12:13:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:13,389 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 12:13:13,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:13:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 12:13:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 12:13:13,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:13,390 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-02 12:13:13,391 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:13,391 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:13,391 INFO L82 PathProgramCache]: Analyzing trace with hash 141355773, now seen corresponding path program 2 times [2018-10-02 12:13:13,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:13,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:13,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:13,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:13:13,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:13,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:13,612 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 [2018-10-02 12:13:13,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:13:13,649 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:13:13,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:13:13,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:13,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:13,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-02 12:13:13,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 12:13:13,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 12:13:13,883 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:13,883 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 12 states. [2018-10-02 12:13:14,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:14,556 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-02 12:13:14,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 12:13:14,557 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2018-10-02 12:13:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:14,558 INFO L225 Difference]: With dead ends: 14 [2018-10-02 12:13:14,558 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 12:13:14,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:13:14,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 12:13:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-02 12:13:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 12:13:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 12:13:14,563 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-02 12:13:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:14,564 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 12:13:14,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 12:13:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 12:13:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 12:13:14,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:14,565 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-02 12:13:14,565 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:14,566 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1596122631, now seen corresponding path program 3 times [2018-10-02 12:13:14,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:14,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:14,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:14,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:13:14,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:14,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:14,717 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 [2018-10-02 12:13:14,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:13:14,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 12:13:14,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:13:14,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:14,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:14,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-02 12:13:14,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:13:14,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:13:14,874 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:14,874 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 14 states. [2018-10-02 12:13:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:15,348 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-02 12:13:15,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 12:13:15,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-10-02 12:13:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:15,352 INFO L225 Difference]: With dead ends: 16 [2018-10-02 12:13:15,352 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 12:13:15,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:13:15,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 12:13:15,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-10-02 12:13:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 12:13:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 12:13:15,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-02 12:13:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:15,358 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 12:13:15,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:13:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 12:13:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 12:13:15,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:15,360 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-02 12:13:15,360 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:15,360 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:15,360 INFO L82 PathProgramCache]: Analyzing trace with hash -570590731, now seen corresponding path program 4 times [2018-10-02 12:13:15,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:15,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:15,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:15,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:13:15,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:15,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:15,605 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 [2018-10-02 12:13:15,615 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:13:15,631 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:13:15,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:13:15,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:15,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:15,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-02 12:13:15,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 12:13:15,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 12:13:15,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:15,890 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 16 states. [2018-10-02 12:13:16,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:16,554 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-02 12:13:16,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 12:13:16,554 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-10-02 12:13:16,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:16,555 INFO L225 Difference]: With dead ends: 18 [2018-10-02 12:13:16,556 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 12:13:16,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:13:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 12:13:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-10-02 12:13:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 12:13:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 12:13:16,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-02 12:13:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:16,563 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 12:13:16,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 12:13:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 12:13:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 12:13:16,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:16,564 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-02 12:13:16,564 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:16,565 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:16,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1418054385, now seen corresponding path program 5 times [2018-10-02 12:13:16,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:16,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:16,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:16,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:13:16,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:16,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:16,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:13:16,754 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:13:31,364 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 12:13:31,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:13:31,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:31,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:31,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-02 12:13:31,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 12:13:31,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 12:13:31,615 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:31,615 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 18 states. [2018-10-02 12:13:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:32,241 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-02 12:13:32,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:13:32,242 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2018-10-02 12:13:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:32,243 INFO L225 Difference]: With dead ends: 20 [2018-10-02 12:13:32,243 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 12:13:32,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:13:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 12:13:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-02 12:13:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 12:13:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 12:13:32,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-02 12:13:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:32,250 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 12:13:32,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 12:13:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 12:13:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 12:13:32,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:32,251 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-02 12:13:32,251 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:32,251 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:32,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1245564141, now seen corresponding path program 6 times [2018-10-02 12:13:32,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:32,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:32,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:32,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:13:32,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:32,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:32,439 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 [2018-10-02 12:13:32,453 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:13:44,794 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 12:13:44,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:13:44,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:45,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:45,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-02 12:13:45,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:13:45,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:13:45,008 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:45,008 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 20 states. [2018-10-02 12:13:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:45,896 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-02 12:13:45,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 12:13:45,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 16 [2018-10-02 12:13:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:45,898 INFO L225 Difference]: With dead ends: 22 [2018-10-02 12:13:45,898 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 12:13:45,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:13:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 12:13:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-10-02 12:13:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 12:13:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 12:13:45,905 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-02 12:13:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:45,905 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 12:13:45,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:13:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 12:13:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 12:13:45,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:45,906 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-02 12:13:45,907 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:45,907 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:45,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1308803095, now seen corresponding path program 7 times [2018-10-02 12:13:45,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:45,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:45,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:45,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:13:45,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:46,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:46,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:13:46,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:13:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:46,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:46,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:46,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-02 12:13:46,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 12:13:46,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 12:13:46,542 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:46,542 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 22 states. [2018-10-02 12:13:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:48,069 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-02 12:13:48,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 12:13:48,070 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 18 [2018-10-02 12:13:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:48,071 INFO L225 Difference]: With dead ends: 24 [2018-10-02 12:13:48,071 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 12:13:48,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime [2018-10-02 12:13:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 12:13:48,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-02 12:13:48,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 12:13:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 12:13:48,077 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-02 12:13:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:48,078 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 12:13:48,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 12:13:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 12:13:48,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 12:13:48,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:48,079 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-02 12:13:48,079 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:48,079 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:48,079 INFO L82 PathProgramCache]: Analyzing trace with hash 665576421, now seen corresponding path program 8 times [2018-10-02 12:13:48,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:48,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:48,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:48,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:13:48,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:48,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:48,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:13:48,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:13:48,656 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:13:48,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:13:48,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:49,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:49,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-10-02 12:13:49,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 12:13:49,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 12:13:49,084 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:49,084 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 24 states. [2018-10-02 12:13:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:50,472 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-02 12:13:50,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 12:13:50,474 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2018-10-02 12:13:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:50,475 INFO L225 Difference]: With dead ends: 26 [2018-10-02 12:13:50,475 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 12:13:50,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime [2018-10-02 12:13:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 12:13:50,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-02 12:13:50,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 12:13:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 12:13:50,484 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-02 12:13:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:50,484 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 12:13:50,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 12:13:50,484 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 12:13:50,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 12:13:50,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:50,485 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-02 12:13:50,485 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:50,486 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash -331253535, now seen corresponding path program 9 times [2018-10-02 12:13:50,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:50,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:50,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:50,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:13:50,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:50,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:50,753 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 [2018-10-02 12:13:50,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:13:55,587 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 12:13:55,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:13:55,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:55,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:55,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-02 12:13:55,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 12:13:55,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 12:13:55,823 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:55,823 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 26 states. [2018-10-02 12:13:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:57,816 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-02 12:13:57,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:13:57,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 22 [2018-10-02 12:13:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:57,818 INFO L225 Difference]: With dead ends: 28 [2018-10-02 12:13:57,818 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 12:13:57,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime [2018-10-02 12:13:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 12:13:57,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-02 12:13:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 12:13:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 12:13:57,826 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-02 12:13:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:57,826 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 12:13:57,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 12:13:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 12:13:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 12:13:57,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:57,827 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-02 12:13:57,827 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:57,828 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:57,828 INFO L82 PathProgramCache]: Analyzing trace with hash -507134243, now seen corresponding path program 10 times [2018-10-02 12:13:57,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:57,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:57,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:57,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:13:57,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:58,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:58,519 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 [2018-10-02 12:13:58,526 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:13:58,562 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:13:58,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:13:58,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:58,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:58,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-10-02 12:13:58,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 12:13:58,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 12:13:58,847 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:58,847 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 28 states. [2018-10-02 12:14:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:00,983 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-02 12:14:00,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:14:00,984 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 24 [2018-10-02 12:14:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:00,985 INFO L225 Difference]: With dead ends: 30 [2018-10-02 12:14:00,985 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 12:14:00,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime [2018-10-02 12:14:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 12:14:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-02 12:14:00,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 12:14:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 12:14:00,996 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-02 12:14:00,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:00,996 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 12:14:00,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 12:14:00,996 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 12:14:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 12:14:00,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:00,997 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-02 12:14:00,997 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:00,998 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:00,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2024770087, now seen corresponding path program 11 times [2018-10-02 12:14:00,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:00,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:00,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:00,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:00,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:14:01,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:01,948 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 [2018-10-02 12:14:01,956 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:15:30,305 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 12:15:30,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:15:30,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:15:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:15:30,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:15:30,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-02 12:15:30,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 12:15:30,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 12:15:30,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:15:30,589 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 30 states. [2018-10-02 12:15:32,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:15:32,963 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-02 12:15:32,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:15:32,963 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 26 [2018-10-02 12:15:32,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:15:32,964 INFO L225 Difference]: With dead ends: 32 [2018-10-02 12:15:32,964 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 12:15:32,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime [2018-10-02 12:15:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 12:15:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-02 12:15:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 12:15:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 12:15:32,974 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-02 12:15:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:15:32,975 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 12:15:32,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 12:15:32,975 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 12:15:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 12:15:32,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:15:32,976 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-02 12:15:32,976 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:15:32,976 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:15:32,976 INFO L82 PathProgramCache]: Analyzing trace with hash -183935531, now seen corresponding path program 12 times [2018-10-02 12:15:32,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:15:32,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:15:32,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:32,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:15:32,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:15:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:15:33,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:15:33,411 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 [2018-10-02 12:15:33,419 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:16:43,690 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 12:16:43,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:48,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:48,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:48,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-10-02 12:16:48,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 12:16:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 12:16:48,483 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:48,483 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 32 states. [2018-10-02 12:16:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:51,269 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-02 12:16:51,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 12:16:51,270 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 28 [2018-10-02 12:16:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:51,271 INFO L225 Difference]: With dead ends: 34 [2018-10-02 12:16:51,271 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 12:16:51,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime [2018-10-02 12:16:51,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 12:16:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-10-02 12:16:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 12:16:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 12:16:51,286 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-02 12:16:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:51,286 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 12:16:51,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 12:16:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 12:16:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 12:16:51,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:51,287 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-02 12:16:51,288 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:51,288 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:51,288 INFO L82 PathProgramCache]: Analyzing trace with hash -668453167, now seen corresponding path program 13 times [2018-10-02 12:16:51,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:51,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:51,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:51,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:51,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:51,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:51,652 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 [2018-10-02 12:16:51,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:16:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:51,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:52,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:52,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-02 12:16:52,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 12:16:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 12:16:52,016 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:52,016 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 34 states. [2018-10-02 12:16:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:54,901 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-02 12:16:54,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 12:16:54,901 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 30 [2018-10-02 12:16:54,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:54,902 INFO L225 Difference]: With dead ends: 36 [2018-10-02 12:16:54,902 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 12:16:54,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime [2018-10-02 12:16:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 12:16:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-02 12:16:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 12:16:54,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 12:16:54,917 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-02 12:16:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:54,917 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 12:16:54,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 12:16:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 12:16:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 12:16:54,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:54,918 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-02 12:16:54,918 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:54,918 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1861533901, now seen corresponding path program 14 times [2018-10-02 12:16:54,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:54,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:54,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:54,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:16:54,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:16:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:55,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:16:55,445 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 [2018-10-02 12:16:55,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:16:55,481 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:16:55,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:16:55,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:16:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:16:55,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:16:55,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-10-02 12:16:55,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 12:16:55,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 12:16:55,991 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:16:55,991 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 36 states. [2018-10-02 12:16:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:16:59,253 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-02 12:16:59,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 12:16:59,253 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 32 [2018-10-02 12:16:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:16:59,254 INFO L225 Difference]: With dead ends: 38 [2018-10-02 12:16:59,255 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 12:16:59,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime [2018-10-02 12:16:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 12:16:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-02 12:16:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 12:16:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 12:16:59,265 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-02 12:16:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:16:59,265 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 12:16:59,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 12:16:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 12:16:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 12:16:59,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:16:59,266 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-02 12:16:59,266 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:16:59,266 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:16:59,266 INFO L82 PathProgramCache]: Analyzing trace with hash -2067350583, now seen corresponding path program 15 times [2018-10-02 12:16:59,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:16:59,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:16:59,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:59,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:16:59,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:16:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:17:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:17:00,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:17:00,312 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 [2018-10-02 12:17:00,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown