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/down.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:43:17,676 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:43:17,678 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:43:17,692 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-02 11:43:17,744 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:43:17,759 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:43:17,759 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:43:17,760 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:43:17,761 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:43:17,761 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:43:17,761 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:43:17,762 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:43:17,762 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:43:17,762 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:43:17,762 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:43:17,762 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:43:17,763 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:43:17,763 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:43:17,763 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:43:17,763 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:43:17,763 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:43:17,764 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:43:17,764 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:43:17,764 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:43:17,764 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:43:17,765 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:43:17,765 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:43:17,765 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:43:17,765 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:43:17,765 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:43:17,766 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:43:17,766 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:43:17,766 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:43:17,766 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:43:17,766 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:43:17,811 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:43:17,825 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:43:17,828 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:43:17,830 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:43:17,831 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:43:17,831 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl [2018-10-02 11:43:17,832 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl' [2018-10-02 11:43:17,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:43:17,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:43:17,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:43:17,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:43:17,894 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:43:17,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:17" (1/1) ... [2018-10-02 11:43:17,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:17" (1/1) ... [2018-10-02 11:43:17,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:43:17,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:43:17,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:43:17,938 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:43:17,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:17" (1/1) ... [2018-10-02 11:43:17,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:17" (1/1) ... [2018-10-02 11:43:17,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:17" (1/1) ... [2018-10-02 11:43:17,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:17" (1/1) ... [2018-10-02 11:43:17,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:17" (1/1) ... [2018-10-02 11:43:17,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:17" (1/1) ... [2018-10-02 11:43:17,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:17" (1/1) ... [2018-10-02 11:43:17,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:43:17,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:43:17,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:43:17,965 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:43:17,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:43:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:43:18,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:43:18,254 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:43:18,255 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:43:18 BoogieIcfgContainer [2018-10-02 11:43:18,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:43:18,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:43:18,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:43:18,260 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:43:18,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:43:17" (1/2) ... [2018-10-02 11:43:18,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f463096 and model type down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:43:18, skipping insertion in model container [2018-10-02 11:43:18,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:43:18" (2/2) ... [2018-10-02 11:43:18,264 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bpl [2018-10-02 11:43:18,274 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:43:18,282 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:43:18,331 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:43:18,332 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:43:18,332 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:43:18,333 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:43:18,333 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:43:18,333 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:43:18,333 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:43:18,333 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:43:18,334 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:43:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-02 11:43:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:43:18,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:18,357 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-02 11:43:18,358 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:18,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:18,364 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-10-02 11:43:18,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:18,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:18,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:18,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:18,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:18,561 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:43:18,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 11:43:18,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:43:18,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:43:18,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:43:18,583 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-02 11:43:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:18,791 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-10-02 11:43:18,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:43:18,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 11:43:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:18,804 INFO L225 Difference]: With dead ends: 16 [2018-10-02 11:43:18,805 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:43:18,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:43:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:43:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 11:43:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:43:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-02 11:43:18,840 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-02 11:43:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:18,841 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-02 11:43:18,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:43:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-02 11:43:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:43:18,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:18,842 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-02 11:43:18,842 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:18,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-10-02 11:43:18,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:18,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:18,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:18,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:18,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:19,095 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:43:19,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-02 11:43:19,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:43:19,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:43:19,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:43:19,098 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-02 11:43:19,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:19,248 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-02 11:43:19,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:43:19,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 11:43:19,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:19,252 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:43:19,252 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:43:19,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:43:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:43:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-10-02 11:43:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:43:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-02 11:43:19,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-02 11:43:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:19,258 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-02 11:43:19,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:43:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-02 11:43:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:43:19,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:19,259 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-02 11:43:19,259 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:19,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-10-02 11:43:19,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:19,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:19,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:19,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:19,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:19,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:19,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:19,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:19,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:19,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:19,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:43:19,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:43:19,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:43:19,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:43:19,475 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-02 11:43:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:19,690 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-02 11:43:19,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:43:19,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-02 11:43:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:19,692 INFO L225 Difference]: With dead ends: 20 [2018-10-02 11:43:19,693 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:43:19,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:43:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:43:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:43:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:43:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-02 11:43:19,698 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-02 11:43:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:19,699 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-02 11:43:19,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:43:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-02 11:43:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:43:19,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:19,700 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-02 11:43:19,700 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:19,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:19,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-10-02 11:43:19,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:19,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:19,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:19,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:19,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:19,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:19,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:20,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:20,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:20,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:20,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:20,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:20,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-02 11:43:20,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:43:20,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:43:20,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:43:20,125 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-02 11:43:20,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:20,356 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-02 11:43:20,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:43:20,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-02 11:43:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:20,358 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:43:20,359 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:43:20,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:43:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:43:20,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-02 11:43:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:43:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-02 11:43:20,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-02 11:43:20,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:20,366 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-02 11:43:20,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:43:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-02 11:43:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:43:20,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:20,368 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-02 11:43:20,368 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:20,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-10-02 11:43:20,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:20,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:20,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:20,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:20,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:20,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:20,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:20,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:20,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 11:43:20,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:20,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:20,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:20,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:43:20,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:43:20,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:43:20,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:43:20,594 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-02 11:43:20,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:20,826 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-02 11:43:20,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:43:20,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-02 11:43:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:20,830 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:43:20,831 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:43:20,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:43:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:43:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 11:43:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 11:43:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-02 11:43:20,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-10-02 11:43:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:20,844 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-02 11:43:20,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:43:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-02 11:43:20,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:43:20,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:20,845 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-10-02 11:43:20,846 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:20,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:20,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-10-02 11:43:20,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:20,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:20,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:20,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:20,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:21,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:21,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:21,104 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:21,118 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:21,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:21,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:21,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:21,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-02 11:43:21,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:43:21,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:43:21,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:43:21,187 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-02 11:43:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:21,344 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-02 11:43:21,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:43:21,346 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-02 11:43:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:21,347 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:43:21,347 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:43:21,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:43:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:43:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-02 11:43:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:43:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-02 11:43:21,353 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-02 11:43:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:21,354 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-02 11:43:21,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:43:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-02 11:43:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:43:21,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:21,355 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-02 11:43:21,355 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:21,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-10-02 11:43:21,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:21,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:21,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:21,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:21,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:21,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:21,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:21,537 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:21,558 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 11:43:21,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:21,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:21,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:21,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:43:21,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:43:21,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:43:21,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:43:21,593 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-02 11:43:21,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:21,772 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-02 11:43:21,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:43:21,772 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-02 11:43:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:21,773 INFO L225 Difference]: With dead ends: 32 [2018-10-02 11:43:21,773 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:43:21,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:43:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:43:21,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 11:43:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 11:43:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-02 11:43:21,779 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-02 11:43:21,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:21,779 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-02 11:43:21,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:43:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-02 11:43:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:43:21,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:21,780 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-02 11:43:21,781 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:21,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:21,781 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-10-02 11:43:21,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:21,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:21,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:21,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:21,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:21,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:21,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:21,983 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:22,027 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-02 11:43:22,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:22,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:22,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:22,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-02 11:43:22,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:43:22,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:43:22,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:43:22,230 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-02 11:43:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:22,446 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-02 11:43:22,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:43:22,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-02 11:43:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:22,449 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:43:22,450 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:43:22,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:43:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:43:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-10-02 11:43:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:43:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-02 11:43:22,456 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-02 11:43:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:22,457 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-02 11:43:22,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:43:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-02 11:43:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:43:22,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:22,458 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-02 11:43:22,458 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:22,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-10-02 11:43:22,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:22,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:22,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:22,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:22,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:22,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:22,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:22,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:22,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:22,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:22,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 11:43:22,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:43:22,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:43:22,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:43:22,657 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-02 11:43:22,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:22,826 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-02 11:43:22,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:43:22,826 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-02 11:43:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:22,827 INFO L225 Difference]: With dead ends: 38 [2018-10-02 11:43:22,827 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:43:22,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:43:22,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:43:22,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 11:43:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:43:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-02 11:43:22,833 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-02 11:43:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:22,836 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-02 11:43:22,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:43:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-02 11:43:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:43:22,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:22,837 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-02 11:43:22,837 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:22,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:22,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-10-02 11:43:22,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:22,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:22,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:22,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:22,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:22,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:22,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:22,988 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:23,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:23,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:23,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:23,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:23,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-02 11:43:23,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:43:23,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:43:23,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:43:23,095 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-10-02 11:43:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:23,385 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-02 11:43:23,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:43:23,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-10-02 11:43:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:23,386 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:43:23,386 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:43:23,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:43:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:43:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-02 11:43:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:43:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-02 11:43:23,394 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-02 11:43:23,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:23,395 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-02 11:43:23,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:43:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-02 11:43:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:43:23,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:23,396 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-02 11:43:23,396 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:23,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-10-02 11:43:23,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:23,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:23,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:23,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:23,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:23,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:23,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:23,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:23,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:43:23,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:23,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:23,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:23,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:43:23,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:43:23,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:43:23,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:43:23,916 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-02 11:43:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:24,108 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-02 11:43:24,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:43:24,109 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-02 11:43:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:24,110 INFO L225 Difference]: With dead ends: 44 [2018-10-02 11:43:24,110 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:43:24,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:43:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:43:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 11:43:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:43:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-02 11:43:24,116 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-02 11:43:24,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:24,116 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-02 11:43:24,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:43:24,116 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-02 11:43:24,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:43:24,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:24,117 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-02 11:43:24,118 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:24,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:24,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-10-02 11:43:24,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:24,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:24,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:24,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:24,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:24,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:24,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:24,514 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:24,533 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:24,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:24,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:24,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:24,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-02 11:43:24,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:43:24,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:43:24,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:43:24,629 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-02 11:43:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:24,846 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-02 11:43:24,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:43:24,847 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-02 11:43:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:24,848 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:43:24,849 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:43:24,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:43:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:43:24,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-02 11:43:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:43:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-02 11:43:24,858 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-10-02 11:43:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:24,858 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-02 11:43:24,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:43:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-02 11:43:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:43:24,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:24,859 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-02 11:43:24,859 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:24,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:24,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-10-02 11:43:24,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:24,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:24,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:24,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:24,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:25,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:25,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:25,128 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:25,170 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:43:25,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:25,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:25,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:25,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:43:25,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:43:25,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:43:25,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:43:25,222 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-02 11:43:25,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:25,706 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-02 11:43:25,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:43:25,706 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-02 11:43:25,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:25,707 INFO L225 Difference]: With dead ends: 50 [2018-10-02 11:43:25,707 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:43:25,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:43:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:43:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 11:43:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 11:43:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-02 11:43:25,714 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-02 11:43:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:25,715 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-02 11:43:25,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:43:25,715 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-02 11:43:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:43:25,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:25,716 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-02 11:43:25,716 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:25,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:25,716 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-10-02 11:43:25,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:25,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:25,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:25,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:25,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:25,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:25,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:25,968 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:26,076 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-02 11:43:26,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:26,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:26,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:26,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-02 11:43:26,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:43:26,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:43:26,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:43:26,308 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-10-02 11:43:26,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:26,545 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-02 11:43:26,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:43:26,546 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-10-02 11:43:26,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:26,547 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:43:26,547 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:43:26,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:43:26,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:43:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-02 11:43:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:43:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-02 11:43:26,554 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-02 11:43:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:26,555 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-02 11:43:26,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:43:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-02 11:43:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:43:26,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:26,555 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-02 11:43:26,556 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:26,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:26,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-10-02 11:43:26,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:26,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:26,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:26,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:26,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:26,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:26,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:26,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:26,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:26,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:26,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 11:43:26,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:43:26,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:43:26,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:43:26,810 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-02 11:43:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:27,510 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-02 11:43:27,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:43:27,510 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-02 11:43:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:27,511 INFO L225 Difference]: With dead ends: 56 [2018-10-02 11:43:27,511 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:43:27,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:43:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:43:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 11:43:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 11:43:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-02 11:43:27,518 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-02 11:43:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:27,518 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-02 11:43:27,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:43:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-02 11:43:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 11:43:27,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:27,519 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-02 11:43:27,519 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:27,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:27,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-10-02 11:43:27,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:27,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:27,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:27,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:27,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:27,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:27,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:27,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:27,709 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:27,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:27,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:27,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:27,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-02 11:43:27,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:43:27,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:43:27,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:43:27,801 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-02 11:43:27,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:28,000 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-02 11:43:28,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:43:28,000 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-02 11:43:28,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:28,001 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:43:28,001 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:43:28,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:43:28,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:43:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-02 11:43:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:43:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-02 11:43:28,010 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-02 11:43:28,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:28,011 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-02 11:43:28,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:43:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-02 11:43:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:43:28,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:28,012 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-02 11:43:28,012 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:28,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:28,013 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-10-02 11:43:28,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:28,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:28,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:28,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:28,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:28,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:28,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:28,419 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:28,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:43:28,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:28,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:28,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:28,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:43:28,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:43:28,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:43:28,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:43:28,490 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-02 11:43:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:28,903 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-02 11:43:28,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:43:28,903 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-02 11:43:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:28,903 INFO L225 Difference]: With dead ends: 62 [2018-10-02 11:43:28,904 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:43:28,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:43:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:43:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 11:43:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:43:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-02 11:43:28,911 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-10-02 11:43:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:28,911 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-02 11:43:28,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:43:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-02 11:43:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:43:28,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:28,912 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-02 11:43:28,913 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:28,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-10-02 11:43:28,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:28,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:28,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:28,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:28,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:29,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:29,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:29,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:29,138 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:29,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:29,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:29,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:29,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-02 11:43:29,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:43:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:43:29,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:43:29,196 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-10-02 11:43:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:29,367 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-02 11:43:29,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:43:29,367 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-02 11:43:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:29,368 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:43:29,368 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:43:29,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:43:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:43:29,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-02 11:43:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:43:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-02 11:43:29,376 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-02 11:43:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:29,376 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-02 11:43:29,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:43:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-02 11:43:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:43:29,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:29,377 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-02 11:43:29,378 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:29,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:29,378 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-10-02 11:43:29,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:29,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:29,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:29,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:29,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:29,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:29,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:29,812 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:29,840 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 11:43:29,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:29,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:29,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:29,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:43:29,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:43:29,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:43:29,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:43:29,873 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-02 11:43:30,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:30,532 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-02 11:43:30,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:43:30,532 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-02 11:43:30,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:30,533 INFO L225 Difference]: With dead ends: 68 [2018-10-02 11:43:30,533 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:43:30,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:43:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:43:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 11:43:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 11:43:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-02 11:43:30,542 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-02 11:43:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:30,543 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-02 11:43:30,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:43:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-02 11:43:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:43:30,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:30,544 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-02 11:43:30,544 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:30,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:30,544 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-10-02 11:43:30,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:30,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:30,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:30,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:30,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:30,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:30,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:30,799 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:30,838 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-02 11:43:30,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:30,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:30,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:30,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-02 11:43:30,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:43:30,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:43:30,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:43:30,913 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-02 11:43:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:31,186 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-02 11:43:31,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:43:31,187 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-02 11:43:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:31,188 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:43:31,188 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:43:31,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:43:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:43:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-10-02 11:43:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:43:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-02 11:43:31,196 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-10-02 11:43:31,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:31,197 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-02 11:43:31,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:43:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-02 11:43:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:43:31,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:31,198 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-02 11:43:31,198 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:31,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:31,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-10-02 11:43:31,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:31,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:31,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:31,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:31,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:31,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:31,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:31,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:31,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:31,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:31,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 11:43:31,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:43:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:43:31,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:43:31,760 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-02 11:43:32,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:32,211 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-02 11:43:32,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:43:32,211 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-02 11:43:32,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:32,212 INFO L225 Difference]: With dead ends: 74 [2018-10-02 11:43:32,212 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:43:32,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:43:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:43:32,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 11:43:32,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:43:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-02 11:43:32,220 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-10-02 11:43:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:32,221 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-02 11:43:32,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:43:32,221 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-02 11:43:32,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:43:32,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:32,222 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-02 11:43:32,222 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:32,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:32,222 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-10-02 11:43:32,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:32,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:32,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:32,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:32,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:34,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:34,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:34,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:34,119 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:34,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:34,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:34,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:34,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-02 11:43:34,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:43:34,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:43:34,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:43:34,191 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-10-02 11:43:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:34,432 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-02 11:43:34,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:43:34,435 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-02 11:43:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:34,436 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:43:34,436 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:43:34,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:43:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:43:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-10-02 11:43:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:43:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-02 11:43:34,446 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-02 11:43:34,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:34,446 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-02 11:43:34,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:43:34,446 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-02 11:43:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:43:34,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:34,447 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-02 11:43:34,447 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:34,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:34,448 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-10-02 11:43:34,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:34,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:34,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:34,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:34,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:34,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:34,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:34,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:34,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 11:43:34,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:34,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:34,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:34,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:43:34,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:43:34,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:43:34,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:43:34,864 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-02 11:43:35,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:35,271 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-02 11:43:35,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:43:35,271 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-02 11:43:35,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:35,272 INFO L225 Difference]: With dead ends: 80 [2018-10-02 11:43:35,272 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:43:35,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:43:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:43:35,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 11:43:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 11:43:35,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-02 11:43:35,280 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-02 11:43:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:35,280 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-02 11:43:35,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:43:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-02 11:43:35,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:43:35,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:35,281 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-02 11:43:35,281 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:35,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-10-02 11:43:35,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:35,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:35,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:35,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:35,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:35,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:35,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:35,609 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:35,640 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:35,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:35,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:35,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:35,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-02 11:43:35,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:43:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:43:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:43:35,735 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-02 11:43:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:36,109 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-02 11:43:36,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:43:36,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-02 11:43:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:36,110 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:43:36,110 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:43:36,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:43:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:43:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-02 11:43:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:43:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-02 11:43:36,120 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-10-02 11:43:36,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:36,121 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-02 11:43:36,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:43:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-02 11:43:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:43:36,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:36,122 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-02 11:43:36,122 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:36,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:36,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-10-02 11:43:36,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:36,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:36,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:36,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:36,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:36,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:36,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:36,616 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:36,655 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 11:43:36,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:36,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:36,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:36,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:43:36,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:43:36,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:43:36,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:43:36,690 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-02 11:43:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:37,168 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-02 11:43:37,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:43:37,168 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-02 11:43:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:37,169 INFO L225 Difference]: With dead ends: 86 [2018-10-02 11:43:37,169 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:43:37,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:43:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:43:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 11:43:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 11:43:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-02 11:43:37,178 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-02 11:43:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:37,178 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-02 11:43:37,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:43:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-02 11:43:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:43:37,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:37,179 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-02 11:43:37,179 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:37,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:37,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-10-02 11:43:37,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:37,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:37,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:37,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:37,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:37,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:37,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:37,759 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:37,806 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-02 11:43:37,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:37,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:37,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:37,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-02 11:43:37,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:43:37,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:43:37,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:43:37,876 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-02 11:43:38,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:38,381 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-02 11:43:38,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:43:38,381 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-10-02 11:43:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:38,382 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:43:38,383 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:43:38,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:43:38,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:43:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-02 11:43:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:43:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-02 11:43:38,391 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-02 11:43:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:38,392 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-02 11:43:38,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:43:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-02 11:43:38,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:43:38,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:38,392 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-02 11:43:38,393 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:38,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-10-02 11:43:38,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:38,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:38,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:38,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:38,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:39,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:39,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:39,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:39,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:39,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:39,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 11:43:39,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:43:39,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:43:39,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:43:39,119 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-02 11:43:39,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:39,956 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-02 11:43:39,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:43:39,956 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-02 11:43:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:39,957 INFO L225 Difference]: With dead ends: 92 [2018-10-02 11:43:39,957 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:43:39,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:43:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:43:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 11:43:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 11:43:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-02 11:43:39,965 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-02 11:43:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:39,965 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-02 11:43:39,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:43:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-02 11:43:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 11:43:39,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:39,966 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-02 11:43:39,966 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:39,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:39,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-10-02 11:43:39,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:39,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:39,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:39,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:39,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:40,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:40,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:40,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:40,448 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:40,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:40,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:40,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:40,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-02 11:43:40,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:43:40,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:43:40,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:43:40,504 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-02 11:43:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:40,769 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-02 11:43:40,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:43:40,770 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-02 11:43:40,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:40,771 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:43:40,771 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:43:40,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:43:40,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:43:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-10-02 11:43:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:43:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-02 11:43:40,779 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-02 11:43:40,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:40,779 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-02 11:43:40,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:43:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-02 11:43:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:43:40,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:40,780 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-02 11:43:40,780 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:40,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:40,780 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-10-02 11:43:40,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:40,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:40,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:40,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:40,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:41,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:41,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:41,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:41,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 11:43:41,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:41,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:41,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:41,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:43:41,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:43:41,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:43:41,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:43:41,554 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-02 11:43:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:42,095 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-02 11:43:42,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:43:42,095 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-02 11:43:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:42,097 INFO L225 Difference]: With dead ends: 98 [2018-10-02 11:43:42,097 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 11:43:42,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:43:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 11:43:42,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 11:43:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 11:43:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-02 11:43:42,108 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-10-02 11:43:42,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:42,108 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-02 11:43:42,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:43:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-02 11:43:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 11:43:42,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:42,109 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-02 11:43:42,109 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:42,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:42,109 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-10-02 11:43:42,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:42,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:42,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:42,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:42,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:42,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:42,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:42,791 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:42,830 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:42,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:42,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:42,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:42,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-02 11:43:42,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:43:42,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:43:42,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:43:42,906 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-10-02 11:43:43,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:43,181 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-02 11:43:43,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:43:43,181 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-10-02 11:43:43,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:43,182 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:43:43,182 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:43:43,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:43:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:43:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-10-02 11:43:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:43:43,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-02 11:43:43,195 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-02 11:43:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:43,195 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-02 11:43:43,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:43:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-02 11:43:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:43:43,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:43,196 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-02 11:43:43,196 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:43,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-10-02 11:43:43,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:43,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:43,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:43,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:43,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:43,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:43,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:43,808 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:44,046 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 11:43:44,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:44,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:44,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:44,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:43:44,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:43:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:43:44,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:43:44,082 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-02 11:43:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:44,951 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-02 11:43:44,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:43:44,951 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-02 11:43:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:44,951 INFO L225 Difference]: With dead ends: 104 [2018-10-02 11:43:44,952 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 11:43:44,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:43:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 11:43:44,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 11:43:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 11:43:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-02 11:43:44,964 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-02 11:43:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:44,964 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-02 11:43:44,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:43:44,964 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-02 11:43:44,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:43:44,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:44,965 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-02 11:43:44,965 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:44,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-10-02 11:43:44,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:44,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:44,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:44,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:44,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:45,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:45,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:45,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:45,394 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-02 11:43:45,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:45,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:45,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:45,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-02 11:43:45,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:43:45,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:43:45,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:43:45,465 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-02 11:43:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:45,766 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-02 11:43:45,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:43:45,766 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-02 11:43:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:45,768 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:43:45,768 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:43:45,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:43:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:43:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-10-02 11:43:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:43:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-02 11:43:45,778 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-10-02 11:43:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:45,779 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-02 11:43:45,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:43:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-02 11:43:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:43:45,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:45,779 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-02 11:43:45,780 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:45,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:45,780 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-10-02 11:43:45,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:45,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:45,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:45,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:45,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:46,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:46,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:46,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:47,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:47,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:47,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 11:43:47,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:43:47,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:43:47,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:43:47,047 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-02 11:43:47,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:47,830 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-02 11:43:47,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:43:47,830 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-02 11:43:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:47,831 INFO L225 Difference]: With dead ends: 110 [2018-10-02 11:43:47,831 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 11:43:47,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:43:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 11:43:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 11:43:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 11:43:47,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-02 11:43:47,843 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-10-02 11:43:47,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:47,843 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-02 11:43:47,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:43:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-02 11:43:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 11:43:47,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:47,844 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-02 11:43:47,844 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:47,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:47,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-10-02 11:43:47,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:47,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:47,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:47,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:47,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:48,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:48,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:48,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:48,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:48,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:48,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:48,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:48,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-02 11:43:48,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:43:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:43:48,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:43:48,248 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-10-02 11:43:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:48,576 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-02 11:43:48,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:43:48,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-10-02 11:43:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:48,577 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:43:48,577 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:43:48,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:43:48,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:43:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-02 11:43:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:43:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-02 11:43:48,587 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-02 11:43:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:48,587 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-02 11:43:48,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:43:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-02 11:43:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:43:48,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:48,588 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-02 11:43:48,588 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:48,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:48,588 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-10-02 11:43:48,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:48,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:48,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:48,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:48,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:49,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:49,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:49,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:49,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 11:43:49,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:49,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:49,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:49,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:43:49,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:43:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:43:49,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:43:49,524 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-02 11:43:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:50,298 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-02 11:43:50,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:43:50,298 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-02 11:43:50,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:50,299 INFO L225 Difference]: With dead ends: 116 [2018-10-02 11:43:50,299 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 11:43:50,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:43:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 11:43:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 11:43:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 11:43:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-02 11:43:50,309 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-02 11:43:50,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:50,309 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-02 11:43:50,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:43:50,310 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-02 11:43:50,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 11:43:50,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:50,310 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-02 11:43:50,310 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:50,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:50,310 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-10-02 11:43:50,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:50,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:50,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:50,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:50,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:50,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:50,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:50,892 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:50,938 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:50,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:50,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:50,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:50,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-02 11:43:50,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:43:50,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:43:50,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:43:50,995 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-02 11:43:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:51,415 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-02 11:43:51,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:43:51,415 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-02 11:43:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:51,416 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:43:51,416 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:43:51,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:43:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:43:51,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-02 11:43:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:43:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-02 11:43:51,428 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-10-02 11:43:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:51,429 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-02 11:43:51,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:43:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-02 11:43:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:43:51,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:51,429 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-02 11:43:51,430 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:51,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:51,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-10-02 11:43:51,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:51,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:51,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:51,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:51,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:52,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:52,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:52,009 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:52,067 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 11:43:52,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:52,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:52,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:52,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:43:52,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:43:52,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:43:52,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:43:52,103 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-02 11:43:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:52,925 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-02 11:43:52,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:43:52,926 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-02 11:43:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:52,926 INFO L225 Difference]: With dead ends: 122 [2018-10-02 11:43:52,926 INFO L226 Difference]: Without dead ends: 81 [2018-10-02 11:43:52,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:43:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-02 11:43:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-02 11:43:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-02 11:43:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-02 11:43:52,938 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-02 11:43:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:52,938 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-02 11:43:52,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:43:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-02 11:43:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 11:43:52,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:52,939 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-02 11:43:52,939 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:52,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:52,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-10-02 11:43:52,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:52,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:52,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:52,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:52,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:53,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:53,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:53,291 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:53,444 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-02 11:43:53,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:53,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:53,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:53,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-02 11:43:53,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:43:53,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:43:53,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:43:53,616 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-02 11:43:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:54,029 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-02 11:43:54,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:43:54,029 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-02 11:43:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:54,030 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:43:54,030 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 11:43:54,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:43:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 11:43:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-02 11:43:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:43:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-02 11:43:54,047 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-02 11:43:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:54,047 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-02 11:43:54,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:43:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-02 11:43:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:43:54,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:54,048 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-02 11:43:54,048 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:54,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-10-02 11:43:54,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:54,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:54,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:54,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:54,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:54,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:54,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:54,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:54,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:55,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:55,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 11:43:55,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:43:55,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:43:55,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:43:55,024 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-02 11:43:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:56,440 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-02 11:43:56,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:43:56,441 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-02 11:43:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:56,441 INFO L225 Difference]: With dead ends: 128 [2018-10-02 11:43:56,441 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 11:43:56,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:43:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 11:43:56,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 11:43:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 11:43:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-02 11:43:56,454 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-02 11:43:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:56,454 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-02 11:43:56,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:43:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-02 11:43:56,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 11:43:56,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:56,455 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-02 11:43:56,455 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:56,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:56,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-10-02 11:43:56,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:56,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:56,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:56,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:56,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:56,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:56,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:56,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:57,016 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:57,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:57,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:57,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:57,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-02 11:43:57,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:43:57,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:43:57,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:43:57,093 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-02 11:43:57,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:57,675 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-02 11:43:57,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:43:57,675 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-02 11:43:57,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:57,676 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:43:57,676 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:43:57,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:43:57,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:43:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-10-02 11:43:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:43:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-02 11:43:57,690 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-02 11:43:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:57,690 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-02 11:43:57,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:43:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-02 11:43:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:43:57,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:57,691 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-02 11:43:57,691 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:57,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:57,691 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-10-02 11:43:57,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:57,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:57,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:57,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:57,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:58,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:58,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:58,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:58,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-02 11:43:58,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:58,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:58,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:58,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:43:58,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:43:58,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:43:58,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:43:58,531 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-02 11:43:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:59,762 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-02 11:43:59,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:43:59,763 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-02 11:43:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:59,763 INFO L225 Difference]: With dead ends: 134 [2018-10-02 11:43:59,763 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 11:43:59,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:43:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 11:43:59,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-02 11:43:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 11:43:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-02 11:43:59,776 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-10-02 11:43:59,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:59,776 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-02 11:43:59,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:43:59,776 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-02 11:43:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 11:43:59,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:59,777 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-02 11:43:59,777 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:59,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:59,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-10-02 11:43:59,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:59,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:59,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:59,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:59,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:00,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:00,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:00,176 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:00,226 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:00,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:00,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:00,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:00,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-02 11:44:00,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:44:00,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:44:00,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:44:00,298 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-10-02 11:44:00,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:00,713 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-02 11:44:00,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:44:00,714 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-10-02 11:44:00,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:00,715 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:44:00,715 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:44:00,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:44:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:44:00,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-10-02 11:44:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:44:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-02 11:44:00,733 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-02 11:44:00,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:00,733 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-02 11:44:00,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:44:00,733 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-02 11:44:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:44:00,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:00,734 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-02 11:44:00,734 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:00,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:00,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-10-02 11:44:00,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:00,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:00,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:00,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:00,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:01,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:01,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:01,706 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:01,771 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 11:44:01,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:01,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:01,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:01,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:44:01,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:44:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:44:01,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:44:01,816 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-02 11:44:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:02,469 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-02 11:44:02,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:44:02,470 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-02 11:44:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:02,470 INFO L225 Difference]: With dead ends: 140 [2018-10-02 11:44:02,470 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 11:44:02,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:44:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 11:44:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 11:44:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 11:44:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-02 11:44:02,485 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-02 11:44:02,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:02,485 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-02 11:44:02,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:44:02,486 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-02 11:44:02,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:44:02,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:02,486 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-02 11:44:02,487 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:02,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:02,487 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-10-02 11:44:02,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:02,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:02,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:02,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:02,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:03,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:03,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:03,100 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:44:03,167 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-02 11:44:03,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:03,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:03,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:03,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-02 11:44:03,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:44:03,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:44:03,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:44:03,244 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-02 11:44:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:03,694 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-02 11:44:03,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:44:03,694 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-02 11:44:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:03,695 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:44:03,695 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:44:03,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:44:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:44:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-02 11:44:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:44:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-02 11:44:03,709 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-10-02 11:44:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:03,709 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-02 11:44:03,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:44:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-02 11:44:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:44:03,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:03,710 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-02 11:44:03,710 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:03,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:03,710 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-10-02 11:44:03,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:03,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:03,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:03,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:03,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:04,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:04,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:04,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:05,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:05,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:05,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:44:05,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:44:05,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:44:05,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:44:05,102 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-02 11:44:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:06,270 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-02 11:44:06,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:44:06,270 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-02 11:44:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:06,271 INFO L225 Difference]: With dead ends: 146 [2018-10-02 11:44:06,271 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 11:44:06,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:44:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 11:44:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 11:44:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 11:44:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-02 11:44:06,288 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-10-02 11:44:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:06,288 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-02 11:44:06,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:44:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-02 11:44:06,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 11:44:06,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:06,289 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-02 11:44:06,290 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:06,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-10-02 11:44:06,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:06,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:06,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:06,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:06,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:06,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:06,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:06,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:44:06,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:44:06,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:06,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:07,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:07,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-02 11:44:07,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:44:07,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:44:07,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:44:07,304 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-10-02 11:44:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:08,029 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-02 11:44:08,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:44:08,030 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-10-02 11:44:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:08,030 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:44:08,031 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:44:08,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:44:08,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:44:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-02 11:44:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:44:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-02 11:44:08,046 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-02 11:44:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:08,046 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-02 11:44:08,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:44:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-02 11:44:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:44:08,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:08,047 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-02 11:44:08,048 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:08,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:08,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-10-02 11:44:08,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:08,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:08,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:08,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:08,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:09,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:09,603 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:09,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:44:09,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-02 11:44:09,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:09,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:09,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:09,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:44:09,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:44:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:44:09,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:44:09,751 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-02 11:44:11,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:11,698 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-02 11:44:11,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:44:11,699 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-02 11:44:11,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:11,699 INFO L225 Difference]: With dead ends: 152 [2018-10-02 11:44:11,699 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 11:44:11,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:44:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 11:44:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 11:44:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 11:44:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-02 11:44:11,715 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-02 11:44:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:11,715 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-02 11:44:11,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:44:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-02 11:44:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 11:44:11,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:11,716 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-02 11:44:11,716 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:11,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:11,716 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-10-02 11:44:11,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:11,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:11,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:11,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:11,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:12,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:12,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:12,948 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:13,009 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:13,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:13,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:13,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:13,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-02 11:44:13,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:44:13,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:44:13,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:44:13,077 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-02 11:44:13,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:13,593 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-02 11:44:13,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:44:13,593 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-02 11:44:13,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:13,594 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:44:13,594 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:44:13,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:44:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:44:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-02 11:44:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:44:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-02 11:44:13,613 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-10-02 11:44:13,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:13,614 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-02 11:44:13,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:44:13,614 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-02 11:44:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:44:13,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:13,615 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-02 11:44:13,615 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:13,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:13,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-10-02 11:44:13,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:13,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:13,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:13,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:13,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:14,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:14,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:14,516 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:14,621 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-02 11:44:14,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:14,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:14,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:14,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:44:14,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:44:14,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:44:14,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:44:14,676 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-02 11:44:16,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:16,106 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-02 11:44:16,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:44:16,106 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-02 11:44:16,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:16,107 INFO L225 Difference]: With dead ends: 158 [2018-10-02 11:44:16,107 INFO L226 Difference]: Without dead ends: 105 [2018-10-02 11:44:16,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:44:16,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-02 11:44:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-02 11:44:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 11:44:16,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-02 11:44:16,130 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-02 11:44:16,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:16,130 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-02 11:44:16,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:44:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-02 11:44:16,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 11:44:16,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:16,131 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-02 11:44:16,131 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:16,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:16,132 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-10-02 11:44:16,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:16,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:16,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:16,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:16,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:16,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:16,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:16,545 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:44:16,623 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-02 11:44:16,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:16,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:16,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:16,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-02 11:44:16,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:44:16,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:44:16,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:44:16,787 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-10-02 11:44:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:17,315 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-02 11:44:17,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:44:17,316 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-10-02 11:44:17,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:17,317 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:44:17,317 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 11:44:17,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:44:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 11:44:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-10-02 11:44:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 11:44:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-02 11:44:17,340 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-02 11:44:17,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:17,340 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-02 11:44:17,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:44:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-02 11:44:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:44:17,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:17,341 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-02 11:44:17,342 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:17,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:17,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-10-02 11:44:17,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:17,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:17,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:17,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:17,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:18,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:18,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:18,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:18,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:18,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:18,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 11:44:18,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:44:18,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:44:18,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:44:18,552 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-02 11:44:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:20,394 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-02 11:44:20,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:44:20,394 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-02 11:44:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:20,395 INFO L225 Difference]: With dead ends: 164 [2018-10-02 11:44:20,395 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 11:44:20,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:44:20,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 11:44:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 11:44:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 11:44:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-02 11:44:20,420 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-02 11:44:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:20,420 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-02 11:44:20,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:44:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-02 11:44:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 11:44:20,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:20,421 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-02 11:44:20,421 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:20,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:20,421 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-10-02 11:44:20,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:20,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:20,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:20,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:20,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:21,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:21,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:21,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:44:21,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:44:21,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:21,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:21,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:21,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-02 11:44:21,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:44:21,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:44:21,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:44:21,651 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-02 11:44:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:22,203 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-02 11:44:22,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:44:22,203 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-02 11:44:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:22,205 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:44:22,205 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 11:44:22,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:44:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 11:44:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-10-02 11:44:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 11:44:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-02 11:44:22,223 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-02 11:44:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:22,223 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-02 11:44:22,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:44:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-02 11:44:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:44:22,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:22,224 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-02 11:44:22,224 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:22,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:22,224 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-10-02 11:44:22,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:22,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:22,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:22,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:22,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:23,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:23,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:23,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:44:23,581 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-02 11:44:23,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:23,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:23,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:23,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 11:44:23,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:44:23,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:44:23,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:44:23,624 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-02 11:44:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:25,421 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-02 11:44:25,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:44:25,422 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-02 11:44:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:25,422 INFO L225 Difference]: With dead ends: 170 [2018-10-02 11:44:25,422 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 11:44:25,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:44:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 11:44:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-02 11:44:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-02 11:44:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-02 11:44:25,445 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-10-02 11:44:25,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:25,445 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-02 11:44:25,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:44:25,445 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-02 11:44:25,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-02 11:44:25,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:25,446 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-02 11:44:25,446 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:25,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:25,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-10-02 11:44:25,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:25,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:25,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:25,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:25,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:25,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:25,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:25,991 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:26,059 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:26,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:26,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:26,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:26,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-02 11:44:26,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:44:26,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:44:26,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:44:26,342 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-10-02 11:44:27,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:27,009 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-02 11:44:27,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:44:27,010 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-10-02 11:44:27,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:27,011 INFO L225 Difference]: With dead ends: 121 [2018-10-02 11:44:27,011 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 11:44:27,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:44:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 11:44:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-02 11:44:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 11:44:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-02 11:44:27,039 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-02 11:44:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:27,040 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-02 11:44:27,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:44:27,040 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-02 11:44:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 11:44:27,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:27,041 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-02 11:44:27,041 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:27,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:27,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-10-02 11:44:27,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:27,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:27,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:27,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:27,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:28,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:28,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:28,280 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:28,364 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-02 11:44:28,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:28,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:28,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:28,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 11:44:28,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:44:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:44:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:44:28,423 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-02 11:44:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:29,887 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-02 11:44:29,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:44:29,887 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-02 11:44:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:29,887 INFO L225 Difference]: With dead ends: 176 [2018-10-02 11:44:29,888 INFO L226 Difference]: Without dead ends: 117 [2018-10-02 11:44:29,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:44:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-02 11:44:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-02 11:44:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-02 11:44:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-02 11:44:29,910 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-02 11:44:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:29,910 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-02 11:44:29,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:44:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-02 11:44:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 11:44:29,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:29,911 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-02 11:44:29,911 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:29,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:29,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-10-02 11:44:29,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:29,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:29,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:29,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:29,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:30,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:30,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:30,587 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:44:30,681 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-02 11:44:30,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:30,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:30,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:30,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-02 11:44:30,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:44:30,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:44:30,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:44:30,957 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-02 11:44:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:31,576 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-02 11:44:31,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:44:31,577 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-02 11:44:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:31,578 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:44:31,578 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 11:44:31,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:44:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 11:44:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-02 11:44:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 11:44:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-02 11:44:31,608 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-10-02 11:44:31,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:31,608 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-02 11:44:31,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:44:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-02 11:44:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 11:44:31,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:31,609 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-02 11:44:31,610 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:31,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:31,610 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-10-02 11:44:31,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:31,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:31,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:31,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:31,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:33,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:33,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:33,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:33,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:33,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:33,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-02 11:44:33,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:44:33,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:44:33,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:44:33,195 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-10-02 11:44:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:36,412 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-02 11:44:36,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:44:36,412 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-02 11:44:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:36,413 INFO L225 Difference]: With dead ends: 182 [2018-10-02 11:44:36,413 INFO L226 Difference]: Without dead ends: 121 [2018-10-02 11:44:36,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:44:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-02 11:44:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-02 11:44:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-02 11:44:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-02 11:44:36,434 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-10-02 11:44:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:36,434 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-02 11:44:36,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:44:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-02 11:44:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-02 11:44:36,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:36,435 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-02 11:44:36,435 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:36,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-10-02 11:44:36,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:36,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:36,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:36,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:36,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:37,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:37,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:37,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:44:37,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:44:37,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:37,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:37,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:37,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-02 11:44:37,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:44:37,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:44:37,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:44:37,673 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-10-02 11:44:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:38,352 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-02 11:44:38,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:44:38,352 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-10-02 11:44:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:38,353 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:44:38,353 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 11:44:38,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:44:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 11:44:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-10-02 11:44:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-02 11:44:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-02 11:44:38,382 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-02 11:44:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:38,382 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-02 11:44:38,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:44:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-02 11:44:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-02 11:44:38,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:38,383 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-02 11:44:38,384 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:38,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:38,384 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-10-02 11:44:38,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:38,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:38,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:38,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:38,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:39,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:39,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:39,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:44:40,119 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-02 11:44:40,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:40,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:40,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:40,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 11:44:40,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:44:40,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:44:40,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:44:40,167 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2018-10-02 11:44:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:42,145 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-02 11:44:42,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:44:42,145 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-02 11:44:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:42,146 INFO L225 Difference]: With dead ends: 188 [2018-10-02 11:44:42,146 INFO L226 Difference]: Without dead ends: 125 [2018-10-02 11:44:42,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:44:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-02 11:44:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-02 11:44:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-02 11:44:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-02 11:44:42,167 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-02 11:44:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:42,168 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-02 11:44:42,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:44:42,168 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-02 11:44:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-02 11:44:42,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:42,168 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-02 11:44:42,168 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:42,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:42,169 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-10-02 11:44:42,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:42,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:42,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:42,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:42,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:42,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:42,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:42,757 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:42,837 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:42,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:42,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:42,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:42,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-02 11:44:42,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:44:42,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:44:42,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:44:42,937 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-02 11:44:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:43,589 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-02 11:44:43,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:44:43,589 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-02 11:44:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:43,590 INFO L225 Difference]: With dead ends: 133 [2018-10-02 11:44:43,590 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 11:44:43,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:44:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 11:44:43,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-10-02 11:44:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-02 11:44:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-02 11:44:43,615 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-10-02 11:44:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:43,615 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-02 11:44:43,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:44:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-02 11:44:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-02 11:44:43,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:43,616 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-02 11:44:43,616 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:43,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-10-02 11:44:43,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:43,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:43,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:43,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:43,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:44,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:44,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:44,800 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:44:44,901 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-02 11:44:44,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:44,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:44,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:44,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 11:44:44,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:44:44,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:44:44,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:44:44,946 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 64 states. [2018-10-02 11:44:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:47,177 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-02 11:44:47,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:44:47,177 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-02 11:44:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:47,178 INFO L225 Difference]: With dead ends: 194 [2018-10-02 11:44:47,178 INFO L226 Difference]: Without dead ends: 129 [2018-10-02 11:44:47,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:44:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-02 11:44:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-02 11:44:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-02 11:44:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-02 11:44:47,200 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-02 11:44:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:47,200 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-02 11:44:47,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:44:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-02 11:44:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 11:44:47,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:47,201 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-02 11:44:47,201 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:47,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:47,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-10-02 11:44:47,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:47,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:47,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:47,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:47,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:47,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:47,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:47,764 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:44:47,866 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-02 11:44:47,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:47,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:47,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:47,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-02 11:44:47,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:44:47,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:44:47,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:44:47,930 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-10-02 11:44:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:48,609 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-02 11:44:48,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:44:48,609 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-10-02 11:44:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:48,610 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:44:48,610 INFO L226 Difference]: Without dead ends: 135 [2018-10-02 11:44:48,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:44:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-02 11:44:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-10-02 11:44:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-02 11:44:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-02 11:44:48,644 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-02 11:44:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:48,645 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-02 11:44:48,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:44:48,645 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-02 11:44:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-02 11:44:48,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:48,646 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-02 11:44:48,646 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:48,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:48,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-10-02 11:44:48,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:48,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:48,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:48,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:48,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:50,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:50,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:50,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:50,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:50,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:50,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-02 11:44:50,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:44:50,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:44:50,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:44:50,220 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 66 states. [2018-10-02 11:44:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:52,610 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-02 11:44:52,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:44:52,610 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-02 11:44:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:52,611 INFO L225 Difference]: With dead ends: 200 [2018-10-02 11:44:52,611 INFO L226 Difference]: Without dead ends: 133 [2018-10-02 11:44:52,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:44:52,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-02 11:44:52,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-02 11:44:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-02 11:44:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-02 11:44:52,635 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-02 11:44:52,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:52,635 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-02 11:44:52,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:44:52,636 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-02 11:44:52,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-02 11:44:52,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:52,636 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-02 11:44:52,636 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:52,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:52,637 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-10-02 11:44:52,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:52,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:52,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:52,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:44:52,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:53,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:53,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:53,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:44:53,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:44:53,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:53,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:53,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:53,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-02 11:44:53,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:44:53,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:44:53,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:44:53,579 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-02 11:44:54,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:54,348 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-02 11:44:54,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:44:54,349 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-02 11:44:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:54,349 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:44:54,349 INFO L226 Difference]: Without dead ends: 139 [2018-10-02 11:44:54,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:44:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-02 11:44:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-02 11:44:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-02 11:44:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-02 11:44:54,376 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-02 11:44:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:54,376 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-02 11:44:54,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:44:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-02 11:44:54,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 11:44:54,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:54,377 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-02 11:44:54,377 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:54,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:54,378 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-10-02 11:44:54,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:54,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:54,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:54,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:54,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:56,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:56,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:56,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:44:56,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-02 11:44:56,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:56,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:56,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:56,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 11:44:56,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:44:56,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:44:56,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:44:56,301 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 68 states. [2018-10-02 11:44:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:44:58,631 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-02 11:44:58,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:44:58,631 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-02 11:44:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:44:58,632 INFO L225 Difference]: With dead ends: 206 [2018-10-02 11:44:58,632 INFO L226 Difference]: Without dead ends: 137 [2018-10-02 11:44:58,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-10-02 11:44:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-02 11:44:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-02 11:44:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-02 11:44:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-02 11:44:58,677 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-10-02 11:44:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:44:58,678 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-02 11:44:58,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:44:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-02 11:44:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-02 11:44:58,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:44:58,679 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-02 11:44:58,679 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:44:58,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:44:58,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-10-02 11:44:58,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:44:58,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:44:58,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:58,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:44:58,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:44:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:44:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:59,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:44:59,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:44:59,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:44:59,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:44:59,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:44:59,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:44:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:44:59,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:44:59,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-02 11:44:59,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:44:59,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:44:59,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:44:59,495 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-10-02 11:45:00,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:00,225 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-02 11:45:00,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:45:00,225 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-10-02 11:45:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:00,226 INFO L225 Difference]: With dead ends: 145 [2018-10-02 11:45:00,226 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 11:45:00,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:45:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 11:45:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-02 11:45:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 11:45:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-02 11:45:00,254 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-02 11:45:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:00,254 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-02 11:45:00,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:45:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-02 11:45:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-02 11:45:00,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:00,255 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-02 11:45:00,255 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:00,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-10-02 11:45:00,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:00,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:00,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:00,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:00,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:02,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:02,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:02,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:45:02,215 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-02 11:45:02,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:02,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:02,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:02,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 11:45:02,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:45:02,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:45:02,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:45:02,263 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 70 states. [2018-10-02 11:45:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:04,649 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-02 11:45:04,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:45:04,649 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-02 11:45:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:04,650 INFO L225 Difference]: With dead ends: 212 [2018-10-02 11:45:04,650 INFO L226 Difference]: Without dead ends: 141 [2018-10-02 11:45:04,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:45:04,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-02 11:45:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-02 11:45:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-02 11:45:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-02 11:45:04,678 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-02 11:45:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:04,678 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-02 11:45:04,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:45:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-02 11:45:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-02 11:45:04,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:04,678 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-02 11:45:04,679 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:04,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:04,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-10-02 11:45:04,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:04,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:04,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:04,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:04,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:05,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:05,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:05,276 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:45:05,393 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-02 11:45:05,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:05,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:05,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:05,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-02 11:45:05,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:45:05,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:45:05,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:45:05,688 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-02 11:45:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:06,639 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-02 11:45:06,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:45:06,640 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-02 11:45:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:06,641 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:45:06,641 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 11:45:06,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:45:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 11:45:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-10-02 11:45:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 11:45:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-02 11:45:06,670 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-10-02 11:45:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:06,670 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-02 11:45:06,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:45:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-02 11:45:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 11:45:06,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:06,671 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-02 11:45:06,671 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:06,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:06,671 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-10-02 11:45:06,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:06,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:06,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:06,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:06,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:08,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:08,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:08,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:08,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:08,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:08,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-02 11:45:08,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:45:08,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:45:08,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:45:08,244 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 72 states. [2018-10-02 11:45:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:10,704 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-02 11:45:10,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:45:10,704 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-02 11:45:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:10,705 INFO L225 Difference]: With dead ends: 218 [2018-10-02 11:45:10,705 INFO L226 Difference]: Without dead ends: 145 [2018-10-02 11:45:10,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-10-02 11:45:10,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-02 11:45:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-02 11:45:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-02 11:45:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-02 11:45:10,745 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-10-02 11:45:10,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:10,745 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-02 11:45:10,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:45:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-02 11:45:10,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-02 11:45:10,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:10,746 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-02 11:45:10,746 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:10,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:10,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-10-02 11:45:10,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:10,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:10,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:10,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:10,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:11,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:11,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:11,726 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:45:11,813 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:45:11,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:11,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:11,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:11,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-02 11:45:11,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:45:11,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:45:11,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:45:11,911 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-10-02 11:45:12,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:12,729 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-02 11:45:12,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:45:12,730 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-10-02 11:45:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:12,731 INFO L225 Difference]: With dead ends: 153 [2018-10-02 11:45:12,731 INFO L226 Difference]: Without dead ends: 151 [2018-10-02 11:45:12,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:45:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-02 11:45:12,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-10-02 11:45:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-02 11:45:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-02 11:45:12,765 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-02 11:45:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:12,765 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-02 11:45:12,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:45:12,765 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-02 11:45:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 11:45:12,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:12,766 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-02 11:45:12,766 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:12,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:12,767 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-10-02 11:45:12,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:12,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:12,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:12,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:12,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:14,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:14,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:14,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:45:14,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-02 11:45:14,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:14,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:14,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:14,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-02 11:45:14,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:45:14,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:45:14,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:45:14,487 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 74 states. [2018-10-02 11:45:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:17,370 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-10-02 11:45:17,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:45:17,371 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-02 11:45:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:17,372 INFO L225 Difference]: With dead ends: 224 [2018-10-02 11:45:17,372 INFO L226 Difference]: Without dead ends: 149 [2018-10-02 11:45:17,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:45:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-02 11:45:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-02 11:45:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-02 11:45:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-02 11:45:17,408 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-02 11:45:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:17,408 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-02 11:45:17,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:45:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-02 11:45:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-02 11:45:17,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:17,409 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-02 11:45:17,410 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:17,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:17,410 INFO L82 PathProgramCache]: Analyzing trace with hash 719817893, now seen corresponding path program 70 times [2018-10-02 11:45:17,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:17,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:17,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:17,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:17,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:18,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:18,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:18,177 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:45:18,268 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:45:18,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:18,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:18,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:18,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-02 11:45:18,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:45:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:45:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:45:18,372 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-02 11:45:19,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:19,215 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-02 11:45:19,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:45:19,216 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-02 11:45:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:19,216 INFO L225 Difference]: With dead ends: 157 [2018-10-02 11:45:19,217 INFO L226 Difference]: Without dead ends: 155 [2018-10-02 11:45:19,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:45:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-02 11:45:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-10-02 11:45:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-02 11:45:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-02 11:45:19,250 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-10-02 11:45:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:19,250 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-02 11:45:19,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:45:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-02 11:45:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-02 11:45:19,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:19,251 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-02 11:45:19,251 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:19,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:19,251 INFO L82 PathProgramCache]: Analyzing trace with hash 255193761, now seen corresponding path program 71 times [2018-10-02 11:45:19,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:19,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:19,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:19,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:19,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:20,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:20,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:20,916 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:45:21,041 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-02 11:45:21,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:21,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:21,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:21,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-02 11:45:21,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:45:21,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:45:21,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:45:21,094 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 76 states. [2018-10-02 11:45:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:24,057 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-10-02 11:45:24,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 11:45:24,057 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-02 11:45:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:24,058 INFO L225 Difference]: With dead ends: 230 [2018-10-02 11:45:24,058 INFO L226 Difference]: Without dead ends: 153 [2018-10-02 11:45:24,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-10-02 11:45:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-02 11:45:24,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-02 11:45:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-02 11:45:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-02 11:45:24,096 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-02 11:45:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:24,096 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-02 11:45:24,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:45:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-02 11:45:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-02 11:45:24,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:24,097 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-02 11:45:24,098 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:24,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash 878185947, now seen corresponding path program 72 times [2018-10-02 11:45:24,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:24,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:24,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:24,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:24,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:24,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:24,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:24,782 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:45:24,911 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-02 11:45:24,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:24,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:25,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:25,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-02 11:45:25,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:45:25,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:45:25,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:45:25,070 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-10-02 11:45:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:25,932 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-10-02 11:45:25,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 11:45:25,932 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-10-02 11:45:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:25,933 INFO L225 Difference]: With dead ends: 161 [2018-10-02 11:45:25,933 INFO L226 Difference]: Without dead ends: 159 [2018-10-02 11:45:25,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:45:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-02 11:45:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-02 11:45:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-02 11:45:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-02 11:45:25,967 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-02 11:45:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:25,967 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-02 11:45:25,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:45:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-02 11:45:25,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-02 11:45:25,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:25,968 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-02 11:45:25,968 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:25,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:25,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2123038295, now seen corresponding path program 73 times [2018-10-02 11:45:25,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:25,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:25,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:25,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:25,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:27,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:27,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:27,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:27,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:28,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:28,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-02 11:45:28,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:45:28,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:45:28,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:45:28,046 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 78 states. [2018-10-02 11:45:30,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:30,946 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-02 11:45:30,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 11:45:30,946 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-02 11:45:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:30,947 INFO L225 Difference]: With dead ends: 236 [2018-10-02 11:45:30,947 INFO L226 Difference]: Without dead ends: 157 [2018-10-02 11:45:30,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-10-02 11:45:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-02 11:45:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-02 11:45:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-02 11:45:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-02 11:45:30,980 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-02 11:45:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:30,980 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-02 11:45:30,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:45:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-02 11:45:30,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-02 11:45:30,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:30,981 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-02 11:45:30,981 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:30,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:30,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1034359663, now seen corresponding path program 74 times [2018-10-02 11:45:30,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:30,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:30,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:30,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:30,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:32,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:32,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:32,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:45:32,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:45:32,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:32,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:32,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:32,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-02 11:45:32,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:45:32,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:45:32,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:45:32,230 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-02 11:45:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:33,096 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-02 11:45:33,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 11:45:33,096 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-02 11:45:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:33,097 INFO L225 Difference]: With dead ends: 165 [2018-10-02 11:45:33,097 INFO L226 Difference]: Without dead ends: 163 [2018-10-02 11:45:33,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:45:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-02 11:45:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-02 11:45:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-02 11:45:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-02 11:45:33,143 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-02 11:45:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:33,143 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-02 11:45:33,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:45:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-02 11:45:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-02 11:45:33,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:33,144 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-02 11:45:33,144 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:33,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:33,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1882257523, now seen corresponding path program 75 times [2018-10-02 11:45:33,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:33,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:33,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:33,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:33,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:35,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:35,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:35,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:45:35,147 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-02 11:45:35,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:35,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:35,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:35,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-02 11:45:35,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:45:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:45:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:45:35,201 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 80 states. [2018-10-02 11:45:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:38,524 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-10-02 11:45:38,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 11:45:38,524 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-02 11:45:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:38,525 INFO L225 Difference]: With dead ends: 242 [2018-10-02 11:45:38,525 INFO L226 Difference]: Without dead ends: 161 [2018-10-02 11:45:38,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-10-02 11:45:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-02 11:45:38,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-02 11:45:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-02 11:45:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-02 11:45:38,564 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-10-02 11:45:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:38,564 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-02 11:45:38,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:45:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-02 11:45:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-02 11:45:38,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:38,565 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-02 11:45:38,566 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:38,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:38,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1109870791, now seen corresponding path program 76 times [2018-10-02 11:45:38,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:38,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:38,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:38,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:38,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:39,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:39,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:39,415 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:45:39,506 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:45:39,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:39,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:39,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:39,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-02 11:45:39,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:45:39,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:45:39,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:45:39,595 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-10-02 11:45:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:40,567 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-02 11:45:40,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 11:45:40,568 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-10-02 11:45:40,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:40,569 INFO L225 Difference]: With dead ends: 169 [2018-10-02 11:45:40,569 INFO L226 Difference]: Without dead ends: 167 [2018-10-02 11:45:40,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:45:40,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-02 11:45:40,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-10-02 11:45:40,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-02 11:45:40,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-02 11:45:40,608 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-02 11:45:40,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:40,608 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-02 11:45:40,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:45:40,608 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-02 11:45:40,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-02 11:45:40,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:40,609 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-02 11:45:40,609 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:40,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1433873987, now seen corresponding path program 77 times [2018-10-02 11:45:40,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:40,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:40,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:40,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:40,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:42,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:42,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:42,810 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:45:42,955 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-02 11:45:42,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:42,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:43,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:43,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-02 11:45:43,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:45:43,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:45:43,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:45:43,019 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 82 states. [2018-10-02 11:45:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:46,391 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-02 11:45:46,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 11:45:46,391 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-02 11:45:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:46,391 INFO L225 Difference]: With dead ends: 248 [2018-10-02 11:45:46,392 INFO L226 Difference]: Without dead ends: 165 [2018-10-02 11:45:46,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-10-02 11:45:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-02 11:45:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-02 11:45:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-02 11:45:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-02 11:45:46,427 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-02 11:45:46,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:46,427 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-02 11:45:46,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:45:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-02 11:45:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-02 11:45:46,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:46,428 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-02 11:45:46,429 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:46,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:46,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352899, now seen corresponding path program 78 times [2018-10-02 11:45:46,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:46,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:46,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:46,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:46,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:47,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:47,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:47,500 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:45:47,643 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-02 11:45:47,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:47,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:47,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:47,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-02 11:45:47,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:45:47,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:45:47,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:45:47,758 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-10-02 11:45:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:48,781 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-10-02 11:45:48,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-02 11:45:48,782 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-10-02 11:45:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:48,782 INFO L225 Difference]: With dead ends: 173 [2018-10-02 11:45:48,783 INFO L226 Difference]: Without dead ends: 171 [2018-10-02 11:45:48,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:45:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-02 11:45:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-10-02 11:45:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-02 11:45:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-02 11:45:48,834 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-10-02 11:45:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:48,835 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-02 11:45:48,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:45:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-02 11:45:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-02 11:45:48,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:48,836 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-02 11:45:48,836 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:48,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:48,836 INFO L82 PathProgramCache]: Analyzing trace with hash -705654151, now seen corresponding path program 79 times [2018-10-02 11:45:48,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:48,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:48,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:48,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:48,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:51,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:51,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:51,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:51,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:51,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:51,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-02 11:45:51,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 11:45:51,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 11:45:51,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:45:51,563 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 84 states. [2018-10-02 11:45:55,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:55,212 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-10-02 11:45:55,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-02 11:45:55,212 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-02 11:45:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:55,213 INFO L225 Difference]: With dead ends: 254 [2018-10-02 11:45:55,213 INFO L226 Difference]: Without dead ends: 169 [2018-10-02 11:45:55,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-10-02 11:45:55,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-02 11:45:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-02 11:45:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-02 11:45:55,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-02 11:45:55,251 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-10-02 11:45:55,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:55,251 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-02 11:45:55,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 11:45:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-02 11:45:55,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-02 11:45:55,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:55,253 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-10-02 11:45:55,253 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:55,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:55,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1476855373, now seen corresponding path program 80 times [2018-10-02 11:45:55,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:55,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:55,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:55,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:45:55,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:56,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:56,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:56,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:45:56,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:45:56,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:56,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:56,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:56,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-02 11:45:56,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:45:56,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:45:56,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:45:56,312 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-10-02 11:45:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:45:57,489 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-10-02 11:45:57,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-02 11:45:57,489 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-10-02 11:45:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:45:57,490 INFO L225 Difference]: With dead ends: 177 [2018-10-02 11:45:57,490 INFO L226 Difference]: Without dead ends: 175 [2018-10-02 11:45:57,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:45:57,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-02 11:45:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-10-02 11:45:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-02 11:45:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-02 11:45:57,529 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-10-02 11:45:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:45:57,529 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-02 11:45:57,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:45:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-02 11:45:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-02 11:45:57,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:45:57,530 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-02 11:45:57,530 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:45:57,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:45:57,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1918872529, now seen corresponding path program 81 times [2018-10-02 11:45:57,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:45:57,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:45:57,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:57,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:45:57,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:45:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:45:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:59,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:45:59,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:45:59,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:45:59,680 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-02 11:45:59,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:45:59,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:45:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:45:59,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:45:59,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-02 11:45:59,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:45:59,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:45:59,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:45:59,757 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 86 states. [2018-10-02 11:46:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:03,604 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-10-02 11:46:03,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-02 11:46:03,604 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-02 11:46:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:03,605 INFO L225 Difference]: With dead ends: 260 [2018-10-02 11:46:03,606 INFO L226 Difference]: Without dead ends: 173 [2018-10-02 11:46:03,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-10-02 11:46:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-02 11:46:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-02 11:46:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-02 11:46:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-02 11:46:03,645 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-10-02 11:46:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:03,645 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-02 11:46:03,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:46:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-02 11:46:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-02 11:46:03,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:03,646 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-10-02 11:46:03,646 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:03,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:03,647 INFO L82 PathProgramCache]: Analyzing trace with hash -900821399, now seen corresponding path program 82 times [2018-10-02 11:46:03,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:03,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:03,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:03,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:03,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:04,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:04,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:04,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:46:04,643 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:46:04,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:04,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:04,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:04,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-02 11:46:04,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:46:04,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:46:04,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:46:04,742 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-10-02 11:46:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:05,817 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-02 11:46:05,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-02 11:46:05,817 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-10-02 11:46:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:05,818 INFO L225 Difference]: With dead ends: 181 [2018-10-02 11:46:05,818 INFO L226 Difference]: Without dead ends: 179 [2018-10-02 11:46:05,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:46:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-02 11:46:05,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-10-02 11:46:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-02 11:46:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-10-02 11:46:05,861 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-10-02 11:46:05,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:05,861 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-10-02 11:46:05,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:46:05,861 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-10-02 11:46:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-02 11:46:05,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:05,862 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-10-02 11:46:05,862 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:05,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:05,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1893962597, now seen corresponding path program 83 times [2018-10-02 11:46:05,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:05,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:05,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:05,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:05,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:08,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:08,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:08,260 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:46:08,420 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-02 11:46:08,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:08,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:08,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:08,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-02 11:46:08,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 11:46:08,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 11:46:08,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:46:08,478 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 88 states. [2018-10-02 11:46:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:10,621 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-10-02 11:46:10,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-02 11:46:10,621 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-02 11:46:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:10,622 INFO L225 Difference]: With dead ends: 266 [2018-10-02 11:46:10,622 INFO L226 Difference]: Without dead ends: 177 [2018-10-02 11:46:10,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-10-02 11:46:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-02 11:46:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-02 11:46:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-02 11:46:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-10-02 11:46:10,664 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-10-02 11:46:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:10,664 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-10-02 11:46:10,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 11:46:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-10-02 11:46:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-02 11:46:10,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:10,665 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-10-02 11:46:10,666 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:10,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:10,666 INFO L82 PathProgramCache]: Analyzing trace with hash -619306849, now seen corresponding path program 84 times [2018-10-02 11:46:10,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:10,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:10,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:10,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:10,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:11,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:11,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:11,702 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:46:11,862 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-02 11:46:11,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:11,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:11,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:11,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-02 11:46:11,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:46:11,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:46:11,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:46:11,962 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-10-02 11:46:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:13,248 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-10-02 11:46:13,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-02 11:46:13,248 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-10-02 11:46:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:13,249 INFO L225 Difference]: With dead ends: 185 [2018-10-02 11:46:13,249 INFO L226 Difference]: Without dead ends: 183 [2018-10-02 11:46:13,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2018-10-02 11:46:13,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-02 11:46:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-10-02 11:46:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-02 11:46:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-02 11:46:13,293 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-10-02 11:46:13,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:13,293 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-02 11:46:13,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:46:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-02 11:46:13,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-02 11:46:13,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:13,294 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-10-02 11:46:13,294 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:13,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:13,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1846505499, now seen corresponding path program 85 times [2018-10-02 11:46:13,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:13,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:13,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:13,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:13,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:15,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:15,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:15,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:46:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:15,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:15,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:15,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-02 11:46:15,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:46:15,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:46:15,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:46:15,703 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 90 states. [2018-10-02 11:46:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:18,299 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-10-02 11:46:18,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-02 11:46:18,299 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-02 11:46:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:18,300 INFO L225 Difference]: With dead ends: 272 [2018-10-02 11:46:18,300 INFO L226 Difference]: Without dead ends: 181 [2018-10-02 11:46:18,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-10-02 11:46:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-02 11:46:18,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-02 11:46:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-02 11:46:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-10-02 11:46:18,343 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-10-02 11:46:18,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:18,343 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-10-02 11:46:18,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 11:46:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-10-02 11:46:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-02 11:46:18,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:18,344 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-10-02 11:46:18,344 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:18,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:18,344 INFO L82 PathProgramCache]: Analyzing trace with hash 895799381, now seen corresponding path program 86 times [2018-10-02 11:46:18,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:18,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:18,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:18,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:46:18,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:19,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:19,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:19,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:46:19,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:46:19,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:19,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:19,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:19,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-10-02 11:46:19,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:46:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:46:19,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:46:19,501 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-10-02 11:46:20,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:20,628 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-10-02 11:46:20,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-02 11:46:20,628 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-10-02 11:46:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:20,629 INFO L225 Difference]: With dead ends: 189 [2018-10-02 11:46:20,629 INFO L226 Difference]: Without dead ends: 187 [2018-10-02 11:46:20,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:46:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-02 11:46:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-10-02 11:46:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-02 11:46:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-10-02 11:46:20,674 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-10-02 11:46:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:20,674 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-10-02 11:46:20,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:46:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-10-02 11:46:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-02 11:46:20,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:20,675 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-10-02 11:46:20,675 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:20,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:20,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1869679185, now seen corresponding path program 87 times [2018-10-02 11:46:20,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:20,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:20,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:20,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:20,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:23,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:23,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:23,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:46:23,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-02 11:46:23,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:23,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:23,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:23,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-02 11:46:23,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 11:46:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 11:46:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:46:23,521 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 92 states. [2018-10-02 11:46:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:26,427 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2018-10-02 11:46:26,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-02 11:46:26,427 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-02 11:46:26,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:26,428 INFO L225 Difference]: With dead ends: 278 [2018-10-02 11:46:26,428 INFO L226 Difference]: Without dead ends: 185 [2018-10-02 11:46:26,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-10-02 11:46:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-02 11:46:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-02 11:46:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-02 11:46:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-10-02 11:46:26,472 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2018-10-02 11:46:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:26,473 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-10-02 11:46:26,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 11:46:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-10-02 11:46:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-02 11:46:26,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:26,474 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-10-02 11:46:26,474 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:26,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:26,474 INFO L82 PathProgramCache]: Analyzing trace with hash -800604789, now seen corresponding path program 88 times [2018-10-02 11:46:26,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:26,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:26,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:26,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:26,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:27,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:27,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:27,445 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:46:27,558 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:46:27,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:27,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:27,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:27,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-10-02 11:46:27,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:46:27,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:46:27,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:46:27,661 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 51 states. [2018-10-02 11:46:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:28,984 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-10-02 11:46:28,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-02 11:46:28,984 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 184 [2018-10-02 11:46:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:28,985 INFO L225 Difference]: With dead ends: 193 [2018-10-02 11:46:28,985 INFO L226 Difference]: Without dead ends: 191 [2018-10-02 11:46:28,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3482, Invalid=5830, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:46:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-02 11:46:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2018-10-02 11:46:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-02 11:46:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-10-02 11:46:29,046 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-10-02 11:46:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:29,046 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-10-02 11:46:29,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:46:29,046 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-10-02 11:46:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-02 11:46:29,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:29,047 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-10-02 11:46:29,047 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:29,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:29,047 INFO L82 PathProgramCache]: Analyzing trace with hash -582123001, now seen corresponding path program 89 times [2018-10-02 11:46:29,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:29,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:29,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:29,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:29,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:31,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:31,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:31,526 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:46:31,700 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-02 11:46:31,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:31,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:31,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:31,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-02 11:46:31,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 11:46:31,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 11:46:31,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:46:31,768 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 94 states. [2018-10-02 11:46:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:33,913 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-10-02 11:46:33,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-02 11:46:33,913 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-02 11:46:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:33,914 INFO L225 Difference]: With dead ends: 284 [2018-10-02 11:46:33,914 INFO L226 Difference]: Without dead ends: 189 [2018-10-02 11:46:33,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-10-02 11:46:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-02 11:46:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-02 11:46:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-02 11:46:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-10-02 11:46:33,960 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-10-02 11:46:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:33,961 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-10-02 11:46:33,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 11:46:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-10-02 11:46:33,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-02 11:46:33,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:33,961 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-10-02 11:46:33,962 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:33,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:33,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1060894655, now seen corresponding path program 90 times [2018-10-02 11:46:33,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:33,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:33,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:33,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:33,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:34,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:34,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:34,986 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:46:35,160 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-02 11:46:35,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:35,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:35,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:35,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-10-02 11:46:35,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:46:35,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:46:35,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:46:35,265 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-10-02 11:46:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:36,461 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-10-02 11:46:36,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-02 11:46:36,462 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-10-02 11:46:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:36,463 INFO L225 Difference]: With dead ends: 197 [2018-10-02 11:46:36,463 INFO L226 Difference]: Without dead ends: 195 [2018-10-02 11:46:36,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2018-10-02 11:46:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-02 11:46:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-10-02 11:46:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-02 11:46:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-02 11:46:36,512 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2018-10-02 11:46:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:36,512 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-02 11:46:36,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:46:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-02 11:46:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-02 11:46:36,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:36,513 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-10-02 11:46:36,513 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:36,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:36,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1612581059, now seen corresponding path program 91 times [2018-10-02 11:46:36,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:36,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:36,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:36,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:36,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:39,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:39,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:39,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:46:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:39,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:39,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:39,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-02 11:46:39,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 11:46:39,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 11:46:39,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:46:39,573 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 96 states. [2018-10-02 11:46:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:42,914 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2018-10-02 11:46:42,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-02 11:46:42,914 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-02 11:46:42,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:42,915 INFO L225 Difference]: With dead ends: 290 [2018-10-02 11:46:42,915 INFO L226 Difference]: Without dead ends: 193 [2018-10-02 11:46:42,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-10-02 11:46:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-02 11:46:42,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-02 11:46:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-02 11:46:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-10-02 11:46:42,965 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2018-10-02 11:46:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:42,965 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-10-02 11:46:42,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 11:46:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-10-02 11:46:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-02 11:46:42,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:42,966 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-10-02 11:46:42,966 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:42,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:42,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1003933815, now seen corresponding path program 92 times [2018-10-02 11:46:42,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:42,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:42,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:42,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:46:42,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:44,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:44,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:44,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:46:44,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:46:44,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:44,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:44,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:44,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-10-02 11:46:44,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:46:44,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:46:44,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:46:44,454 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 53 states. [2018-10-02 11:46:45,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:45,692 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-10-02 11:46:45,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-02 11:46:45,693 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 192 [2018-10-02 11:46:45,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:45,694 INFO L225 Difference]: With dead ends: 201 [2018-10-02 11:46:45,694 INFO L226 Difference]: Without dead ends: 199 [2018-10-02 11:46:45,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3777, Invalid=6323, Unknown=0, NotChecked=0, Total=10100 [2018-10-02 11:46:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-02 11:46:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-10-02 11:46:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-02 11:46:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-10-02 11:46:45,763 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-10-02 11:46:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:45,763 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-10-02 11:46:45,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:46:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-10-02 11:46:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-02 11:46:45,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:45,764 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-10-02 11:46:45,764 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:45,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:45,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1587312141, now seen corresponding path program 93 times [2018-10-02 11:46:45,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:45,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:45,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:45,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:45,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:48,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:48,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:48,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:46:48,903 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-02 11:46:48,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:48,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:48,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:48,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-02 11:46:48,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 11:46:48,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 11:46:48,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:46:48,969 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 98 states. [2018-10-02 11:46:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:52,358 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2018-10-02 11:46:52,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-02 11:46:52,358 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-02 11:46:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:52,359 INFO L225 Difference]: With dead ends: 296 [2018-10-02 11:46:52,359 INFO L226 Difference]: Without dead ends: 197 [2018-10-02 11:46:52,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-10-02 11:46:52,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-02 11:46:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-02 11:46:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-02 11:46:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-10-02 11:46:52,412 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-10-02 11:46:52,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:52,412 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-10-02 11:46:52,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 11:46:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-10-02 11:46:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-02 11:46:52,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:52,413 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-10-02 11:46:52,413 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:52,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash 410334765, now seen corresponding path program 94 times [2018-10-02 11:46:52,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:52,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:52,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:52,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:52,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:53,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:53,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:53,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:46:53,962 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:46:53,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:53,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:54,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:54,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-10-02 11:46:54,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:46:54,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:46:54,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:46:54,054 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-10-02 11:46:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:46:55,427 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-10-02 11:46:55,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-02 11:46:55,427 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-10-02 11:46:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:46:55,428 INFO L225 Difference]: With dead ends: 205 [2018-10-02 11:46:55,429 INFO L226 Difference]: Without dead ends: 203 [2018-10-02 11:46:55,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2018-10-02 11:46:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-02 11:46:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-10-02 11:46:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-02 11:46:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-10-02 11:46:55,500 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2018-10-02 11:46:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:46:55,501 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-10-02 11:46:55,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:46:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-10-02 11:46:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-02 11:46:55,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:46:55,501 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-10-02 11:46:55,502 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:46:55,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:46:55,502 INFO L82 PathProgramCache]: Analyzing trace with hash -805348823, now seen corresponding path program 95 times [2018-10-02 11:46:55,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:46:55,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:46:55,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:55,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:46:55,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:46:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:46:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:58,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:46:58,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:46:58,199 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:46:58,388 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-02 11:46:58,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:46:58,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:46:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:46:58,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:46:58,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-02 11:46:58,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 11:46:58,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 11:46:58,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:46:58,455 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 100 states. [2018-10-02 11:47:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:02,054 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2018-10-02 11:47:02,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-02 11:47:02,055 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-10-02 11:47:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:02,055 INFO L225 Difference]: With dead ends: 302 [2018-10-02 11:47:02,056 INFO L226 Difference]: Without dead ends: 201 [2018-10-02 11:47:02,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-10-02 11:47:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-02 11:47:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-02 11:47:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-02 11:47:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-10-02 11:47:02,108 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2018-10-02 11:47:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:02,109 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-10-02 11:47:02,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 11:47:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-10-02 11:47:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-02 11:47:02,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:02,109 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-10-02 11:47:02,110 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:02,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:02,110 INFO L82 PathProgramCache]: Analyzing trace with hash -779331229, now seen corresponding path program 96 times [2018-10-02 11:47:02,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:02,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:02,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:02,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:02,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:03,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:03,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:03,226 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:47:03,422 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-02 11:47:03,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:03,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:03,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:03,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-10-02 11:47:03,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:47:03,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:47:03,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:47:03,536 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 55 states. [2018-10-02 11:47:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:05,013 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2018-10-02 11:47:05,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-02 11:47:05,014 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 200 [2018-10-02 11:47:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:05,014 INFO L225 Difference]: With dead ends: 209 [2018-10-02 11:47:05,014 INFO L226 Difference]: Without dead ends: 207 [2018-10-02 11:47:05,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4084, Invalid=6836, Unknown=0, NotChecked=0, Total=10920 [2018-10-02 11:47:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-02 11:47:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-10-02 11:47:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-02 11:47:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-02 11:47:05,069 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-10-02 11:47:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:05,070 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-02 11:47:05,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:47:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-02 11:47:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-02 11:47:05,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:05,070 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-10-02 11:47:05,071 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:05,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:05,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1613068321, now seen corresponding path program 97 times [2018-10-02 11:47:05,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:05,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:05,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:05,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:05,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:07,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:07,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:07,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:07,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:08,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:08,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-02 11:47:08,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 11:47:08,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 11:47:08,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:47:08,051 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 102 states. [2018-10-02 11:47:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:11,943 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2018-10-02 11:47:11,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-02 11:47:11,944 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-10-02 11:47:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:11,944 INFO L225 Difference]: With dead ends: 308 [2018-10-02 11:47:11,944 INFO L226 Difference]: Without dead ends: 205 [2018-10-02 11:47:11,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-10-02 11:47:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-02 11:47:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-02 11:47:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-02 11:47:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-10-02 11:47:11,999 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-10-02 11:47:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:12,000 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-10-02 11:47:12,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 11:47:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-10-02 11:47:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-02 11:47:12,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:12,001 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-10-02 11:47:12,001 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:12,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:12,001 INFO L82 PathProgramCache]: Analyzing trace with hash 134306329, now seen corresponding path program 98 times [2018-10-02 11:47:12,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:12,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:12,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:12,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:12,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:13,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:13,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:13,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:47:13,474 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:47:13,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:13,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:13,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:13,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2018-10-02 11:47:13,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:47:13,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:47:13,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:47:13,588 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 56 states. Received shutdown request... [2018-10-02 11:47:14,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:47:14,306 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:47:14,310 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:47:14,311 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:47:14 BoogieIcfgContainer [2018-10-02 11:47:14,311 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:47:14,312 INFO L168 Benchmark]: Toolchain (without parser) took 236422.00 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 82.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 331.4 MB). Peak memory consumption was 413.7 MB. Max. memory is 7.1 GB. [2018-10-02 11:47:14,313 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:47:14,313 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:47:14,313 INFO L168 Benchmark]: Boogie Preprocessor took 25.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:47:14,314 INFO L168 Benchmark]: RCFGBuilder took 291.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:47:14,314 INFO L168 Benchmark]: TraceAbstraction took 236054.27 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 82.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 310.2 MB). Peak memory consumption was 392.5 MB. Max. memory is 7.1 GB. [2018-10-02 11:47:14,316 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 291.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236054.27 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 82.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 310.2 MB). Peak memory consumption was 392.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (205states) and FLOYD_HOARE automaton (currently 75 states, 56 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 78 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 235.9s OverallTime, 100 OverallIterations, 51 TraceHistogramMax, 118.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1725 SDtfs, 1113 SDslu, 8066 SDs, 0 SdLazy, 75952 SolverSat, 5678 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18259 GetRequests, 11664 SyntacticMatches, 0 SemanticMatches, 6594 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106052 ImplicationChecksByTransitivity, 150.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=205occurred in iteration=99, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 99 MinimizatonAttempts, 196 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 8.2s SatisfiabilityAnalysisTime, 100.4s InterpolantComputationTime, 20986 NumberOfCodeBlocks, 20986 NumberOfCodeBlocksAsserted, 1455 NumberOfCheckSat, 20788 ConstructedInterpolants, 0 QuantifiedInterpolants, 8474199 SizeOfPredicates, 294 NumberOfNonLiveVariables, 41454 ConjunctsInSsa, 5488 ConjunctsInUnsatCore, 198 InterpolantComputations, 2 PerfectInterpolantSequences, 171698/338298 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-47-14-325.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-47-14-325.csv Completed graceful shutdown