java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/const1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:19:07,728 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:19:07,731 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:19:07,747 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:19:07,747 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:19:07,749 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:19:07,751 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:19:07,753 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:19:07,755 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:19:07,757 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:19:07,758 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:19:07,758 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:19:07,760 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:19:07,763 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:19:07,769 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:19:07,770 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:19:07,774 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:19:07,779 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:19:07,781 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:19:07,783 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:19:07,785 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:19:07,786 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:19:07,788 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:19:07,796 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-26 21:19:07,811 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:19:07,811 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:19:07,812 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:19:07,812 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:19:07,813 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:19:07,813 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:19:07,813 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:19:07,814 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:19:07,814 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:19:07,814 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:19:07,814 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:19:07,814 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:19:07,814 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:19:07,815 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:19:07,815 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:19:07,815 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:19:07,815 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:19:07,815 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:19:07,816 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:19:07,816 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:19:07,816 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:19:07,816 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:19:07,816 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:19:07,817 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:19:07,817 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:19:07,817 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:19:07,817 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:19:07,817 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:19:07,818 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:19:07,818 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:19:07,873 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:19:07,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:19:07,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:19:07,892 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:19:07,892 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:19:07,893 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/const1.i_3.bpl [2018-09-26 21:19:07,894 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/const1.i_3.bpl' [2018-09-26 21:19:07,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:19:07,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:19:07,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:19:07,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:19:07,955 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:19:07,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:19:07" (1/1) ... [2018-09-26 21:19:07,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:19:07" (1/1) ... [2018-09-26 21:19:07,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:19:08,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:19:08,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:19:08,000 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:19:08,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:19:07" (1/1) ... [2018-09-26 21:19:08,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:19:07" (1/1) ... [2018-09-26 21:19:08,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:19:07" (1/1) ... [2018-09-26 21:19:08,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:19:07" (1/1) ... [2018-09-26 21:19:08,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:19:07" (1/1) ... [2018-09-26 21:19:08,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:19:07" (1/1) ... [2018-09-26 21:19:08,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:19:07" (1/1) ... [2018-09-26 21:19:08,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:19:08,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:19:08,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:19:08,025 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:19:08,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:19:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:19:08,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:19:08,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:19:08,273 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:19:08,273 INFO L202 PluginConnector]: Adding new model const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:19:08 BoogieIcfgContainer [2018-09-26 21:19:08,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:19:08,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:19:08,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:19:08,278 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:19:08,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:19:07" (1/2) ... [2018-09-26 21:19:08,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b37a757 and model type const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:19:08, skipping insertion in model container [2018-09-26 21:19:08,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:19:08" (2/2) ... [2018-09-26 21:19:08,282 INFO L112 eAbstractionObserver]: Analyzing ICFG const1.i_3.bpl [2018-09-26 21:19:08,292 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:19:08,300 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:19:08,353 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:19:08,353 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:19:08,354 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:19:08,354 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:19:08,354 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:19:08,354 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:19:08,354 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:19:08,355 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:19:08,355 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:19:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:19:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:19:08,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:08,378 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:19:08,379 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:08,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:08,386 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 21:19:08,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:08,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:08,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:08,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:08,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:08,626 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:19:08,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:19:08,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:19:08,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:19:08,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:19:08,647 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-26 21:19:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:08,703 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-26 21:19:08,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:19:08,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 21:19:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:08,717 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:19:08,717 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:19:08,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:19:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:19:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:19:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:19:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:19:08,766 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 21:19:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:08,767 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:19:08,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:19:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:19:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:19:08,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:08,769 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 21:19:08,769 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:08,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-26 21:19:08,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:08,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:08,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:08,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:08,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:08,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:08,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:08,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:08,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:09,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:09,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:19:09,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:19:09,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:19:09,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:19:09,117 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-26 21:19:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:09,222 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:19:09,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:19:09,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:19:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:09,224 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:19:09,224 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:19:09,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:19:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:19:09,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:19:09,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:19:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:19:09,229 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-26 21:19:09,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:09,229 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:19:09,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:19:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:19:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:19:09,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:09,230 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-26 21:19:09,231 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:09,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:09,231 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-26 21:19:09,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:09,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:09,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:09,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:09,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:09,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:09,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:09,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:09,539 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:09,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:09,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:09,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:09,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:19:09,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:19:09,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:19:09,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:19:09,602 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-26 21:19:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:09,673 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:19:09,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:19:09,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:19:09,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:09,674 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:19:09,675 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:19:09,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:19:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:19:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:19:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:19:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:19:09,680 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-26 21:19:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:09,680 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:19:09,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:19:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:19:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:19:09,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:09,682 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-26 21:19:09,682 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:09,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:09,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-26 21:19:09,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:09,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:09,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:09,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:09,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:10,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:10,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:10,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:10,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:19:10,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:10,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:10,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:10,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:19:10,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:19:10,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:19:10,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:19:10,173 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-26 21:19:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:10,238 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:19:10,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:19:10,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 21:19:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:10,240 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:19:10,241 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:19:10,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:19:10,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:19:10,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:19:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:19:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:19:10,247 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-26 21:19:10,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:10,248 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:19:10,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:19:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:19:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:19:10,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:10,249 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-26 21:19:10,249 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:10,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:10,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-26 21:19:10,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:10,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:10,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:10,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:10,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:10,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:10,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:10,420 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:10,447 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:10,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:10,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:10,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:10,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:19:10,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:19:10,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:19:10,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:19:10,488 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-26 21:19:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:10,632 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:19:10,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:19:10,633 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-26 21:19:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:10,634 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:19:10,635 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:19:10,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:19:10,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:19:10,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:19:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:19:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:19:10,640 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-26 21:19:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:10,641 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:19:10,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:19:10,641 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:19:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:19:10,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:10,642 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-26 21:19:10,642 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:10,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:10,643 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-26 21:19:10,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:10,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:10,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:10,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:10,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:10,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:10,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:10,827 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:10,917 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:19:10,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:10,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:10,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:10,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:19:10,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:19:10,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:19:10,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:19:10,982 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-26 21:19:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:11,088 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:19:11,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:19:11,089 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-26 21:19:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:11,090 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:19:11,090 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:19:11,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:19:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:19:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:19:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:19:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:19:11,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-26 21:19:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:11,096 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:19:11,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:19:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:19:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:19:11,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:11,097 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-26 21:19:11,098 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:11,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:11,098 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-26 21:19:11,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:11,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:11,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:11,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:11,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:11,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:11,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:11,558 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:11,607 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:19:11,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:11,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:11,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:11,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:19:11,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:19:11,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:19:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:19:11,696 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-26 21:19:11,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:11,790 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:19:11,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:19:11,793 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:19:11,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:11,794 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:19:11,794 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:19:11,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:19:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:19:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:19:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:19:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:19:11,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-26 21:19:11,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:11,800 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:19:11,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:19:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:19:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:19:11,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:11,801 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-26 21:19:11,801 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:11,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:11,802 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-26 21:19:11,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:11,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:11,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:11,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:11,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:12,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:12,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:12,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:12,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:12,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:12,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:19:12,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:19:12,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:19:12,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:19:12,149 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-26 21:19:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:12,241 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:19:12,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:19:12,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-26 21:19:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:12,244 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:19:12,244 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:19:12,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:19:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:19:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:19:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:19:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:19:12,250 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-26 21:19:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:12,251 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:19:12,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:19:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:19:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:19:12,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:12,252 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-26 21:19:12,252 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:12,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:12,253 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-26 21:19:12,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:12,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:12,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:12,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:12,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:12,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:12,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:12,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:12,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:12,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:12,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:12,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:12,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:19:12,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:19:12,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:19:12,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:19:12,599 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-26 21:19:12,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:12,781 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:19:12,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:19:12,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-26 21:19:12,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:12,784 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:19:12,784 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:19:12,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:19:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:19:12,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:19:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:19:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:19:12,791 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-26 21:19:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:12,791 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:19:12,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:19:12,792 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:19:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:19:12,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:12,792 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-26 21:19:12,793 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:12,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-26 21:19:12,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:12,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:12,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:12,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:12,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:12,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:12,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:12,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:13,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-26 21:19:13,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:13,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:13,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:13,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:19:13,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:19:13,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:19:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:19:13,172 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-26 21:19:13,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:13,329 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:19:13,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:19:13,329 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-26 21:19:13,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:13,330 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:19:13,331 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:19:13,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:19:13,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:19:13,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:19:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:19:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:19:13,337 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-26 21:19:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:13,338 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:19:13,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:19:13,338 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:19:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:19:13,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:13,339 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-26 21:19:13,339 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:13,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:13,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-26 21:19:13,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:13,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:13,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:13,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:13,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:13,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:13,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:13,554 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:13,568 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:13,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:13,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:13,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:13,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:19:13,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:19:13,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:19:13,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:19:13,619 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-26 21:19:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:13,919 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:19:13,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:19:13,919 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-26 21:19:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:13,921 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:19:13,921 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:19:13,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:19:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:19:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:19:13,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:19:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:19:13,928 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-26 21:19:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:13,928 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:19:13,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:19:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:19:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:19:13,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:13,930 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-26 21:19:13,930 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:13,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:13,930 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-26 21:19:13,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:13,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:13,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:13,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:13,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:14,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:14,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:14,236 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:17,952 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:19:17,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:17,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:18,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:18,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:19:18,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:19:18,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:19:18,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:19:18,034 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-26 21:19:18,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:18,176 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:19:18,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:19:18,178 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-26 21:19:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:18,179 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:19:18,180 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:19:18,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:19:18,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:19:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:19:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:19:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:19:18,186 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-26 21:19:18,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:18,186 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:19:18,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:19:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:19:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:19:18,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:18,187 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-26 21:19:18,187 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:18,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-26 21:19:18,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:18,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:18,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:18,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:18,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:18,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:18,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:18,579 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:19:18,690 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:19:18,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:18,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:18,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:18,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:19:18,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:19:18,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:19:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:19:18,731 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-26 21:19:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:18,917 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:19:18,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:19:18,917 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-26 21:19:18,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:18,918 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:19:18,918 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:19:18,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:19:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:19:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:19:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:19:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:19:18,925 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-26 21:19:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:18,925 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:19:18,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:19:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:19:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:19:18,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:18,927 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-26 21:19:18,927 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:18,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:18,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-26 21:19:18,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:18,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:18,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:18,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:18,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:19,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:19,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:19,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:19,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:19,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:19,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:19:19,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:19:19,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:19:19,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:19:19,564 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-26 21:19:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:19,731 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:19:19,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:19:19,732 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-26 21:19:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:19,733 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:19:19,733 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:19:19,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:19:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:19:19,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:19:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:19:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:19:19,740 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-26 21:19:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:19,741 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:19:19,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:19:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:19:19,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:19:19,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:19,742 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-26 21:19:19,743 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:19,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:19,743 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-26 21:19:19,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:19,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:19,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:19,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:19:19,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:20,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:20,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:20,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:19:20,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:19:20,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:20,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:20,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:20,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:19:20,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:19:20,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:19:20,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:19:20,546 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-26 21:19:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:21,136 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:19:21,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:19:21,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-26 21:19:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:21,137 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:19:21,138 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:19:21,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:19:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:19:21,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:19:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:19:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:19:21,143 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-26 21:19:21,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:21,143 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:19:21,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:19:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:19:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:19:21,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:21,144 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-26 21:19:21,144 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:21,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:21,144 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-26 21:19:21,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:21,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:21,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:21,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:21,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:21,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:21,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:21,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:19:21,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:19:21,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:21,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:21,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:21,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:19:21,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:19:21,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:19:21,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:19:21,817 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-26 21:19:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:22,086 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:19:22,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:19:22,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-26 21:19:22,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:22,089 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:19:22,089 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:19:22,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:19:22,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:19:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:19:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:19:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:19:22,095 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-26 21:19:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:22,095 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:19:22,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:19:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:19:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:19:22,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:22,096 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-26 21:19:22,097 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:22,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:22,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-26 21:19:22,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:22,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:22,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:22,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:22,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:22,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:22,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:22,476 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:19:22,506 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:19:22,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:22,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:22,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:22,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:19:22,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:19:22,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:19:22,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:19:22,575 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-26 21:19:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:22,899 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:19:22,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:19:22,901 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-26 21:19:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:22,902 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:19:22,902 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:19:22,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:19:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:19:22,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:19:22,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:19:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:19:22,908 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-26 21:19:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:22,908 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:19:22,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:19:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:19:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:19:22,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:22,909 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-26 21:19:22,910 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:22,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:22,910 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-26 21:19:22,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:22,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:22,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:22,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:22,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:23,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:23,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:23,614 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:19:53,977 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:19:53,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:19:54,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:19:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:54,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:19:54,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:19:54,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:19:54,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:19:54,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:19:54,073 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-26 21:19:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:19:54,382 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:19:54,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:19:54,382 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-26 21:19:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:19:54,383 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:19:54,383 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:19:54,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:19:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:19:54,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:19:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:19:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:19:54,392 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-26 21:19:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:19:54,392 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:19:54,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:19:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:19:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:19:54,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:19:54,393 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-26 21:19:54,394 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:19:54,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:19:54,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-26 21:19:54,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:19:54,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:19:54,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:54,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:19:54,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:19:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:19:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:19:54,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:19:54,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:19:54,781 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:04,766 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:20:04,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:04,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:04,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:04,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:20:04,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:20:04,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:20:04,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:20:04,845 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-26 21:20:05,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:05,599 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:20:05,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:20:05,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-26 21:20:05,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:05,601 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:20:05,601 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:20:05,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:20:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:20:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:20:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:20:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:20:05,607 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-26 21:20:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:05,607 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:20:05,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:20:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:20:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:20:05,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:05,608 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-26 21:20:05,608 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:05,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-26 21:20:05,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:05,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:05,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:05,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:05,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:05,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:05,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:05,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:05,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:06,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:06,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:20:06,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:20:06,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:20:06,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:20:06,057 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-26 21:20:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:06,684 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:20:06,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:20:06,684 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-26 21:20:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:06,685 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:20:06,685 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:20:06,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:20:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:20:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:20:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:20:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:20:06,692 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-26 21:20:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:06,693 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:20:06,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:20:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:20:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:20:06,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:06,693 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-26 21:20:06,694 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:06,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:06,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-26 21:20:06,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:06,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:06,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:06,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:06,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:07,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:07,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:07,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:07,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:07,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:07,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:07,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:07,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:20:07,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:20:07,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:20:07,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:20:07,343 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-26 21:20:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:07,678 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:20:07,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:20:07,678 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-26 21:20:07,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:07,679 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:20:07,679 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:20:07,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:20:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:20:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:20:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:20:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:20:07,686 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-26 21:20:07,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:07,687 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:20:07,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:20:07,687 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:20:07,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:20:07,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:07,688 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-26 21:20:07,688 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:07,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:07,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-26 21:20:07,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:07,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:07,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:07,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:07,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:08,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:08,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:08,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:16,101 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-26 21:20:16,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:16,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:16,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:16,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:20:16,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:20:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:20:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:20:16,165 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-26 21:20:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:16,514 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:20:16,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:20:16,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-26 21:20:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:16,516 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:20:16,516 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:20:16,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:20:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:20:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:20:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:20:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-26 21:20:16,522 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-26 21:20:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:16,523 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-26 21:20:16,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:20:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-26 21:20:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:20:16,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:16,524 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-26 21:20:16,524 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:16,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-26 21:20:16,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:16,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:16,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:16,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:16,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:17,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:17,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:17,260 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:17,284 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:17,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:17,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:17,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:17,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:20:17,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:20:17,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:20:17,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:20:17,324 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-26 21:20:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:17,755 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:20:17,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:20:17,756 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-26 21:20:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:17,757 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:20:17,757 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:20:17,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:20:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:20:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:20:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:20:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:20:17,766 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-26 21:20:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:17,766 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:20:17,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:20:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:20:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:20:17,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:17,768 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-26 21:20:17,769 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:17,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-26 21:20:17,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:17,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:17,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:17,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:17,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:18,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:18,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:18,402 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:42,351 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-26 21:21:42,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:42,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:42,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:42,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:21:42,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:21:42,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:21:42,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:21:42,592 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-26 21:21:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:43,151 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:21:43,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:21:43,151 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-26 21:21:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:43,152 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:21:43,152 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:21:43,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:21:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:21:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:21:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:21:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-26 21:21:43,159 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-26 21:21:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:43,160 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-26 21:21:43,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:21:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-26 21:21:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:21:43,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:43,161 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-26 21:21:43,161 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:43,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:43,162 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-26 21:21:43,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:43,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:43,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:43,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:43,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:44,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:44,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:21:44,095 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:07,790 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:22:07,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:07,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:07,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:07,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:22:07,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:22:07,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:22:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:22:07,859 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-26 21:22:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:08,342 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:22:08,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:22:08,342 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-26 21:22:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:08,343 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:22:08,343 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:22:08,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:22:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:22:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:22:08,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:22:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:22:08,349 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-26 21:22:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:08,350 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:22:08,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:22:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:22:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:22:08,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:08,350 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-26 21:22:08,351 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:08,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:08,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-26 21:22:08,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:08,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:08,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:08,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:08,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:09,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:09,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:09,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:09,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:09,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:09,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:22:09,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:22:09,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:22:09,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:22:09,247 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-26 21:22:09,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:09,900 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:22:09,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:22:09,901 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-26 21:22:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:09,901 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:22:09,902 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:22:09,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:22:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:22:09,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:22:09,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:22:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-26 21:22:09,906 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-26 21:22:09,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:09,907 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-26 21:22:09,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:22:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-26 21:22:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:22:09,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:09,907 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-26 21:22:09,907 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:09,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:09,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-26 21:22:09,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:09,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:09,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:09,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:09,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:11,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:11,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:11,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:22:11,355 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:22:11,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:11,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:11,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:11,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:22:11,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:22:11,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:22:11,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:22:11,410 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-26 21:22:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:11,917 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:22:11,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:22:11,918 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-26 21:22:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:11,919 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:22:11,919 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:22:11,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:22:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:22:11,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:22:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:22:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:22:11,924 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-26 21:22:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:11,925 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:22:11,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:22:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:22:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:22:11,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:11,926 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-26 21:22:11,926 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:11,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:11,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-26 21:22:11,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:11,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:11,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:11,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:11,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:12,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:12,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:12,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:22,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:22:22,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:22,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:22,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:22,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:22:22,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:22:22,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:22:22,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:22:22,291 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-26 21:22:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:22,836 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:22:22,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:22:22,837 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-26 21:22:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:22,838 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:22:22,838 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:22:22,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:22:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:22:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:22:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:22:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-26 21:22:22,844 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-26 21:22:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:22,845 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-26 21:22:22,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:22:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-26 21:22:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:22:22,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:22,846 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-26 21:22:22,846 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:22,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:22,846 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-26 21:22:22,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:22,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:22,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:22,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:22,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:23,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:23,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:23,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:23,528 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:23,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:23,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:23,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:23,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:22:23,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:22:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:22:23,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:22:23,589 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-26 21:22:24,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:24,191 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:22:24,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:22:24,192 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-26 21:22:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:24,193 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:22:24,193 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:22:24,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:22:24,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:22:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:22:24,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:22:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-26 21:22:24,198 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-26 21:22:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:24,198 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-26 21:22:24,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:22:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-26 21:22:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:22:24,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:24,199 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-26 21:22:24,199 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:24,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:24,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-26 21:22:24,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:24,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:24,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:24,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:24,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:25,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:25,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:25,367 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown