java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:31:11,642 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:31:11,644 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:31:11,658 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:31:11,659 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:31:11,660 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:31:11,661 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:31:11,663 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:31:11,666 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:31:11,670 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:31:11,671 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 10:31:11,671 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 10:31:11,674 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 10:31:11,676 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 10:31:11,677 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 10:31:11,681 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 10:31:11,682 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 10:31:11,687 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 10:31:11,692 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 10:31:11,695 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 10:31:11,696 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 10:31:11,697 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 10:31:11,703 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 10:31:11,715 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 10:31:11,733 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:31:11,733 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:31:11,734 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:31:11,735 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:31:11,735 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:31:11,735 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:31:11,736 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:31:11,736 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:31:11,736 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:31:11,736 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:31:11,737 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:31:11,737 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:31:11,737 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:31:11,737 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:31:11,737 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:31:11,737 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:31:11,738 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:31:11,738 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:31:11,738 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:31:11,738 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:31:11,739 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:31:11,739 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:31:11,739 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:31:11,739 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:31:11,739 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:31:11,740 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:31:11,740 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:31:11,740 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:31:11,740 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:31:11,740 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:31:11,785 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:31:11,799 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:31:11,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:31:11,807 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:31:11,808 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:31:11,809 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl [2018-09-30 10:31:11,810 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl' [2018-09-30 10:31:11,864 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:31:11,868 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:31:11,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:31:11,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:31:11,869 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:31:11,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:11" (1/1) ... [2018-09-30 10:31:11,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:11" (1/1) ... [2018-09-30 10:31:11,910 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:31:11,910 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:31:11,911 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:31:11,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:31:11,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:31:11,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:31:11,914 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:31:11,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:11" (1/1) ... [2018-09-30 10:31:11,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:11" (1/1) ... [2018-09-30 10:31:11,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:11" (1/1) ... [2018-09-30 10:31:11,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:11" (1/1) ... [2018-09-30 10:31:11,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:11" (1/1) ... [2018-09-30 10:31:11,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:11" (1/1) ... [2018-09-30 10:31:11,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:11" (1/1) ... [2018-09-30 10:31:11,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:31:11,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:31:11,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:31:11,939 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:31:11,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:31:12,017 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 10:31:12,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 10:31:12,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 10:31:12,180 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:31:12,181 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:31:12 BoogieIcfgContainer [2018-09-30 10:31:12,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:31:12,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:31:12,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:31:12,185 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:31:12,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:31:11" (1/2) ... [2018-09-30 10:31:12,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732bc5f7 and model type HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:31:12, skipping insertion in model container [2018-09-30 10:31:12,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:31:12" (2/2) ... [2018-09-30 10:31:12,189 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEquality-Safe.bpl [2018-09-30 10:31:12,199 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:31:12,207 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:31:12,258 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:31:12,259 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:31:12,259 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:31:12,259 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:31:12,260 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:31:12,260 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:31:12,260 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:31:12,260 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:31:12,260 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:31:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-30 10:31:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-30 10:31:12,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:12,283 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-30 10:31:12,284 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:12,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:12,291 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-30 10:31:12,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:12,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:12,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:12,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:12,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:12,481 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:31:12,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 10:31:12,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:31:12,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:31:12,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:31:12,502 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-30 10:31:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:12,552 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:31:12,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:31:12,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-30 10:31:12,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:12,565 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:31:12,565 INFO L226 Difference]: Without dead ends: 4 [2018-09-30 10:31:12,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:31:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-30 10:31:12,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-30 10:31:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-30 10:31:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-30 10:31:12,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-30 10:31:12,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:12,605 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-30 10:31:12,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:31:12,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-30 10:31:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:31:12,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:12,606 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:31:12,606 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:12,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:12,606 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-30 10:31:12,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:12,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:12,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:12,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:12,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:12,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:12,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:12,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:12,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:12,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:12,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-30 10:31:12,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:31:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:31:12,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:31:12,826 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-09-30 10:31:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:12,878 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-30 10:31:12,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:31:12,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-09-30 10:31:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:12,880 INFO L225 Difference]: With dead ends: 6 [2018-09-30 10:31:12,880 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 10:31:12,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:31:12,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 10:31:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 10:31:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 10:31:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 10:31:12,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 10:31:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:12,887 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 10:31:12,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:31:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 10:31:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:31:12,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:12,888 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-30 10:31:12,892 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:12,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-30 10:31:12,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:12,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:12,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:12,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:12,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:12,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:12,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:12,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:12,996 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:12,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:13,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:13,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:13,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:31:13,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:31:13,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:31:13,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:31:13,025 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-30 10:31:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:13,050 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-30 10:31:13,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:31:13,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 10:31:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:13,051 INFO L225 Difference]: With dead ends: 7 [2018-09-30 10:31:13,051 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 10:31:13,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:31:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 10:31:13,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 10:31:13,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:31:13,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 10:31:13,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 10:31:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:13,055 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 10:31:13,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:31:13,055 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 10:31:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:31:13,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:13,056 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-30 10:31:13,056 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:13,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:13,057 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-30 10:31:13,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:13,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:13,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:13,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:13,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:13,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:13,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:13,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:13,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:31:13,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:13,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:13,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:13,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:31:13,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:31:13,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:31:13,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:31:13,184 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 10:31:13,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:13,246 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 10:31:13,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:31:13,247 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 10:31:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:13,248 INFO L225 Difference]: With dead ends: 8 [2018-09-30 10:31:13,248 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:31:13,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:31:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:31:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:31:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:31:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:31:13,252 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 10:31:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:13,252 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:31:13,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:31:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:31:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:31:13,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:13,253 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-30 10:31:13,253 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:13,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:13,254 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-30 10:31:13,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:13,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:13,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:13,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:13,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:13,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:13,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:13,529 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:13,569 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:13,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:13,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:13,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:13,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:31:13,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:31:13,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:31:13,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:31:13,611 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-30 10:31:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:13,643 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:31:13,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:31:13,643 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-30 10:31:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:13,644 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:31:13,644 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:31:13,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:31:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:31:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:31:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:31:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 10:31:13,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 10:31:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:13,649 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 10:31:13,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:31:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 10:31:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:31:13,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:13,650 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-30 10:31:13,650 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:13,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:13,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-30 10:31:13,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:13,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:13,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:13,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:13,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:13,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:13,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:13,840 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:13,857 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:31:13,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:13,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:13,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:13,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:31:13,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:31:13,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:31:13,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:31:13,888 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 10:31:13,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:13,951 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 10:31:13,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:31:13,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 10:31:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:13,952 INFO L225 Difference]: With dead ends: 10 [2018-09-30 10:31:13,953 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:31:13,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:31:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:31:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:31:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:31:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:31:13,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 10:31:13,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:13,958 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:31:13,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:31:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:31:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:31:13,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:13,959 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-30 10:31:13,959 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:13,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:13,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-30 10:31:13,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:13,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:13,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:13,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:13,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:14,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:14,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:14,185 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:14,197 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:31:14,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:14,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:14,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:14,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:31:14,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:31:14,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:31:14,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:31:14,232 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-30 10:31:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:14,264 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:31:14,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:31:14,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-30 10:31:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:14,265 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:31:14,266 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:31:14,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:31:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:31:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:31:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:31:14,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 10:31:14,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 10:31:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:14,271 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 10:31:14,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:31:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 10:31:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:31:14,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:14,272 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-30 10:31:14,272 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:14,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:14,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-30 10:31:14,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:14,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:14,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:14,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:14,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:14,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:14,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:14,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:14,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:14,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:14,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:31:14,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:31:14,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:31:14,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:31:14,469 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 10:31:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:14,718 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 10:31:14,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:31:14,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 10:31:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:14,721 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:31:14,721 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:31:14,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:31:14,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:31:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:31:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:31:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:31:14,727 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 10:31:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:14,727 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:31:14,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:31:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:31:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:31:14,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:14,729 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-30 10:31:14,730 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:14,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-30 10:31:14,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:14,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:14,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:14,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:14,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:14,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:14,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:14,911 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:14,929 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:14,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:14,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:14,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:14,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:31:14,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:31:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:31:14,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:31:14,965 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-30 10:31:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:15,010 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:31:15,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:31:15,011 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-30 10:31:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:15,011 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:31:15,011 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:31:15,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:31:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:31:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:31:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:31:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 10:31:15,016 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 10:31:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:15,016 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 10:31:15,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:31:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 10:31:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:31:15,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:15,017 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-30 10:31:15,017 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:15,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:15,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-30 10:31:15,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:15,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:15,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:15,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:15,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:15,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:15,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:15,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:15,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:31:15,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:15,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:15,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:15,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:31:15,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:31:15,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:31:15,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:31:15,205 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 10:31:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:15,264 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 10:31:15,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:31:15,264 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 10:31:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:15,265 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:31:15,265 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:31:15,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:31:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:31:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:31:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:31:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:31:15,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 10:31:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:15,269 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:31:15,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:31:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:31:15,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:31:15,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:15,270 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-30 10:31:15,271 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:15,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:15,271 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-30 10:31:15,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:15,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:15,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:15,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:15,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:15,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:15,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:15,489 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:15,505 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:15,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:15,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:15,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:15,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:31:15,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:31:15,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:31:15,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:31:15,547 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-30 10:31:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:15,717 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:31:15,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:31:15,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-30 10:31:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:15,719 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:31:15,719 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:31:15,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:31:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:31:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:31:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:31:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 10:31:15,722 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 10:31:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:15,722 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 10:31:15,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:31:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 10:31:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:31:15,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:15,723 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-30 10:31:15,723 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:15,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:15,724 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-30 10:31:15,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:15,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:15,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:15,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:15,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:16,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:16,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:16,023 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:16,037 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:31:16,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:16,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:16,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:16,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:31:16,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:31:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:31:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:31:16,073 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 10:31:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:16,130 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 10:31:16,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:31:16,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 10:31:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:16,131 INFO L225 Difference]: With dead ends: 16 [2018-09-30 10:31:16,131 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:31:16,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:31:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:31:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:31:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:31:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:31:16,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 10:31:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:16,134 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:31:16,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:31:16,134 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:31:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:31:16,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:16,135 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-30 10:31:16,135 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:16,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:16,136 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-30 10:31:16,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:16,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:16,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:16,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:16,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:16,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:16,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:16,386 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:16,403 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:31:16,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:16,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:16,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:16,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:31:16,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:31:16,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:31:16,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:31:16,438 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-30 10:31:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:16,474 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:31:16,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:31:16,475 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 10:31:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:16,475 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:31:16,475 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:31:16,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:31:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:31:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:31:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:31:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 10:31:16,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 10:31:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:16,479 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 10:31:16,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:31:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 10:31:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:31:16,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:16,480 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-30 10:31:16,481 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:16,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:16,481 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-30 10:31:16,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:16,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:16,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:16,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:16,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:16,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:16,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:16,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:16,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:16,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:16,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:31:16,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:31:16,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:31:16,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:31:16,771 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 10:31:16,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:16,972 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 10:31:16,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:31:16,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 10:31:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:16,973 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:31:16,973 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:31:16,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:31:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:31:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:31:16,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:31:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:31:16,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 10:31:16,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:16,983 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:31:16,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:31:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:31:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:31:16,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:16,985 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-30 10:31:16,985 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:16,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-30 10:31:16,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:16,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:16,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:16,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:16,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:17,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:17,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:17,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:17,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:17,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:17,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:17,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:17,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:31:17,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:31:17,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:31:17,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:31:17,396 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-30 10:31:17,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:17,444 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:31:17,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:31:17,445 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-30 10:31:17,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:17,445 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:31:17,445 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:31:17,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:31:17,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:31:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:31:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:31:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 10:31:17,449 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 10:31:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:17,449 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 10:31:17,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:31:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 10:31:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:31:17,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:17,450 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-30 10:31:17,451 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:17,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-30 10:31:17,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:17,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:17,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:17,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:17,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:17,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:17,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:17,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:17,762 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:31:17,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:17,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:17,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:17,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:31:17,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:31:17,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:31:17,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:31:17,797 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 10:31:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:17,839 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 10:31:17,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:31:17,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 10:31:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:17,840 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:31:17,840 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:31:17,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:31:17,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:31:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:31:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:31:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:31:17,843 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 10:31:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:17,844 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:31:17,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:31:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:31:17,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:31:17,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:17,845 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-30 10:31:17,845 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:17,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:17,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-30 10:31:17,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:17,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:17,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:17,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:17,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:18,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:18,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:18,109 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:18,135 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:18,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:18,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:18,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:18,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:31:18,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:31:18,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:31:18,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:31:18,179 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-30 10:31:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:18,573 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:31:18,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:31:18,573 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-30 10:31:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:18,574 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:31:18,574 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:31:18,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:31:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:31:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:31:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:31:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 10:31:18,577 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 10:31:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:18,578 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 10:31:18,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:31:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 10:31:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:31:18,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:18,579 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-30 10:31:18,579 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:18,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-30 10:31:18,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:18,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:18,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:18,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:18,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:19,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:19,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:19,074 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:19,091 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 10:31:19,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:19,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:19,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:19,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:31:19,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:31:19,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:31:19,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:31:19,130 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 10:31:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:19,182 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 10:31:19,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:31:19,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 10:31:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:19,183 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:31:19,183 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:31:19,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:31:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:31:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:31:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:31:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:31:19,188 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 10:31:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:19,188 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:31:19,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:31:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:31:19,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:31:19,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:19,189 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-30 10:31:19,189 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:19,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-30 10:31:19,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:19,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:19,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:19,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:19,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:19,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:19,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:19,435 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:19,450 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 10:31:19,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:19,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:19,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:19,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:31:19,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:31:19,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:31:19,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:31:19,491 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-30 10:31:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:19,573 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:31:19,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:31:19,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-30 10:31:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:19,575 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:31:19,575 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:31:19,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:31:19,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:31:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:31:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:31:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 10:31:19,579 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 10:31:19,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:19,579 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 10:31:19,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:31:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 10:31:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:31:19,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:19,580 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-30 10:31:19,581 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:19,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:19,581 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-30 10:31:19,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:19,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:19,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:19,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:19,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:19,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:19,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:19,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:19,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:19,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:19,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:31:19,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:31:19,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:31:19,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:31:19,995 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 10:31:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:20,086 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 10:31:20,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:31:20,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 10:31:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:20,088 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:31:20,088 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:31:20,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:31:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:31:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:31:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:31:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:31:20,093 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 10:31:20,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:20,093 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:31:20,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:31:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:31:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:31:20,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:20,094 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-30 10:31:20,094 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:20,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:20,095 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-30 10:31:20,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:20,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:20,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:20,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:20,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:20,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:20,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:20,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:20,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:20,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:20,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:20,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:20,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:31:20,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:31:20,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:31:20,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:31:20,453 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-30 10:31:20,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:20,527 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:31:20,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:31:20,527 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-30 10:31:20,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:20,528 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:31:20,528 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:31:20,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:31:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:31:20,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:31:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:31:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 10:31:20,532 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 10:31:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:20,532 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 10:31:20,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:31:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 10:31:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:31:20,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:20,533 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-30 10:31:20,534 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:20,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:20,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-30 10:31:20,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:20,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:20,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:20,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:20,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:20,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:20,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:20,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:20,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:31:20,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:20,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:20,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:20,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:31:20,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:31:20,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:31:20,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:31:20,952 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 10:31:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:21,068 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 10:31:21,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:31:21,070 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 10:31:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:21,071 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:31:21,071 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:31:21,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:31:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:31:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:31:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:31:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:31:21,075 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 10:31:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:21,075 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:31:21,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:31:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:31:21,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:31:21,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:21,076 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-30 10:31:21,077 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:21,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:21,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-30 10:31:21,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:21,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:21,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:21,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:21,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:21,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:21,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:21,620 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:21,634 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:21,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:21,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:21,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:21,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:31:21,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:31:21,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:31:21,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:31:21,670 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-30 10:31:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:21,716 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:31:21,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:31:21,717 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-30 10:31:21,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:21,718 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:31:21,718 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:31:21,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:31:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:31:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:31:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:31:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 10:31:21,722 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 10:31:21,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:21,722 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 10:31:21,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:31:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 10:31:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:31:21,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:21,723 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-30 10:31:21,723 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:21,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:21,724 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-30 10:31:21,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:21,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:21,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:21,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:21,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:22,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:22,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:22,248 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:22,272 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:31:22,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:22,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:22,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:22,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:31:22,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:31:22,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:31:22,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:31:22,317 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 10:31:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:22,425 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 10:31:22,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:31:22,426 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 10:31:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:22,427 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:31:22,427 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:31:22,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:31:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:31:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:31:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:31:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:31:22,433 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 10:31:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:22,433 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:31:22,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:31:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:31:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:31:22,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:22,434 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-30 10:31:22,434 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:22,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-30 10:31:22,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:22,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:22,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:22,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:22,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:23,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:23,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:23,102 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:23,175 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:31:23,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:23,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:23,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:23,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:31:23,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:31:23,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:31:23,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:31:23,206 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-30 10:31:23,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:23,284 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:31:23,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:31:23,284 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-30 10:31:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:23,285 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:31:23,285 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:31:23,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:31:23,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:31:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:31:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:31:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 10:31:23,289 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 10:31:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:23,290 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 10:31:23,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:31:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 10:31:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:31:23,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:23,291 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-30 10:31:23,291 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:23,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-30 10:31:23,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:23,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:23,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:23,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:23,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:23,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:23,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:23,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:23,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:23,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:23,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:31:23,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:31:23,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:31:23,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:31:23,860 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 10:31:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:23,908 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 10:31:23,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:31:23,908 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 10:31:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:23,909 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:31:23,909 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:31:23,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:31:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:31:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:31:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:31:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:31:23,914 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 10:31:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:23,914 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:31:23,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:31:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:31:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:31:23,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:23,915 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-30 10:31:23,915 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:23,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:23,916 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-30 10:31:23,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:23,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:23,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:23,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:23,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:24,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:24,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:24,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:24,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:24,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:24,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:24,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:24,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:31:24,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:31:24,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:31:24,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:31:24,590 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-30 10:31:24,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:24,676 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:31:24,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:31:24,677 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-30 10:31:24,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:24,677 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:31:24,678 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:31:24,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:31:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:31:24,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:31:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:31:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 10:31:24,682 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 10:31:24,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:24,682 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 10:31:24,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:31:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 10:31:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:31:24,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:24,683 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-30 10:31:24,683 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:24,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-30 10:31:24,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:24,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:24,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:24,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:24,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:25,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:25,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:25,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:25,671 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 10:31:25,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:25,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:25,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:25,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:31:25,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:31:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:31:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:31:25,708 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 10:31:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:25,940 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 10:31:25,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:31:25,940 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 10:31:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:25,941 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:31:25,941 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:31:25,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:31:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:31:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:31:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:31:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:31:25,946 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 10:31:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:25,946 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:31:25,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:31:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:31:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:31:25,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:25,947 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-30 10:31:25,947 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:25,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:25,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-30 10:31:25,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:25,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:25,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:25,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:25,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:26,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:26,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:26,676 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:26,693 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:26,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:26,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:26,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:26,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:31:26,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:31:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:31:26,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:31:26,729 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-30 10:31:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:26,784 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:31:26,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:31:26,784 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-30 10:31:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:26,784 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:31:26,784 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:31:26,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:31:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:31:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:31:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:31:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 10:31:26,788 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 10:31:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:26,789 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 10:31:26,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:31:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 10:31:26,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:31:26,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:26,790 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-30 10:31:26,790 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:26,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:26,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-30 10:31:26,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:26,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:26,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:26,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:26,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:27,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:27,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:27,303 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:27,328 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 10:31:27,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:27,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:27,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:27,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:31:27,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:31:27,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:31:27,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:31:27,365 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 10:31:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:27,463 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 10:31:27,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:31:27,463 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 10:31:27,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:27,464 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:31:27,464 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:31:27,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:31:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:31:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:31:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:31:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:31:27,469 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 10:31:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:27,469 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:31:27,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:31:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:31:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:31:27,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:27,470 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-30 10:31:27,470 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:27,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:27,471 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-30 10:31:27,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:27,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:27,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:27,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:27,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:28,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:28,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:28,118 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:28,176 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 10:31:28,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:28,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:28,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:28,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:31:28,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:31:28,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:31:28,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:31:28,223 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-30 10:31:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:28,310 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:31:28,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:31:28,311 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-30 10:31:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:28,311 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:31:28,312 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:31:28,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:31:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:31:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:31:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:31:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 10:31:28,316 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 10:31:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:28,316 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 10:31:28,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:31:28,317 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 10:31:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:31:28,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:28,317 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-30 10:31:28,317 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:28,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:28,318 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-30 10:31:28,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:28,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:28,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:28,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:28,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:28,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:28,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:28,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:28,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:28,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:28,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:31:28,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:31:28,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:31:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:31:28,988 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 10:31:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:29,186 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 10:31:29,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:31:29,187 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 10:31:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:29,188 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:31:29,188 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:31:29,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:31:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:31:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:31:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:31:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:31:29,192 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 10:31:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:29,192 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:31:29,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:31:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:31:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:31:29,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:29,193 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-30 10:31:29,193 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:29,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:29,193 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-30 10:31:29,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:29,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:29,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:29,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:29,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:29,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:29,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:29,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:29,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:29,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:29,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:29,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:29,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:31:29,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:31:29,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:31:29,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:31:29,792 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-30 10:31:29,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:29,870 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:31:29,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:31:29,871 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-30 10:31:29,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:29,871 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:31:29,871 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:31:29,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:31:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:31:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:31:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:31:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 10:31:29,876 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 10:31:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:29,876 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 10:31:29,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:31:29,876 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 10:31:29,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:31:29,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:29,877 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-30 10:31:29,877 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:29,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:29,877 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-30 10:31:29,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:29,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:29,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:29,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:29,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:30,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:30,394 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 [2018-09-30 10:31:30,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:30,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 10:31:30,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:30,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:30,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:30,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:31:30,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:31:30,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:31:30,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:31:30,459 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 10:31:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:30,508 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 10:31:30,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:31:30,509 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 10:31:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:30,510 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:31:30,510 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:31:30,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:31:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:31:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:31:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:31:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:31:30,514 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 10:31:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:30,514 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:31:30,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:31:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:31:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:31:30,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:30,515 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-30 10:31:30,515 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:30,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:30,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-30 10:31:30,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:30,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:30,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:30,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:30,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:31,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:31,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:31,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:31,087 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:31,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:31,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:31,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:31,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:31:31,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:31:31,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:31:31,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:31:31,128 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-30 10:31:31,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:31,200 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:31:31,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:31:31,201 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-30 10:31:31,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:31,201 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:31:31,201 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:31:31,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:31:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:31:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:31:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:31:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 10:31:31,206 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 10:31:31,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:31,206 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 10:31:31,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:31:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 10:31:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:31:31,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:31,207 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-30 10:31:31,207 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:31,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:31,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-30 10:31:31,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:31,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:31,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:31,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:31,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:32,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:32,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:32,016 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:32,044 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:31:32,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:32,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:32,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:32,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:31:32,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:31:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:31:32,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:31:32,079 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 10:31:32,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:32,165 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 10:31:32,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:31:32,165 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 10:31:32,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:32,166 INFO L225 Difference]: With dead ends: 40 [2018-09-30 10:31:32,166 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:31:32,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:31:32,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:31:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:31:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:31:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:31:32,170 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 10:31:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:32,170 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:31:32,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:31:32,171 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:31:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:31:32,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:32,171 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-30 10:31:32,171 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:32,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:32,172 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-30 10:31:32,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:32,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:32,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:32,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:32,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:32,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:32,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:32,954 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:32,983 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:31:32,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:32,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:33,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:33,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:31:33,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:31:33,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:31:33,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:31:33,026 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-30 10:31:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:33,672 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:31:33,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:31:33,672 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-30 10:31:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:33,673 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:31:33,673 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:31:33,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:31:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:31:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:31:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:31:33,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 10:31:33,676 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 10:31:33,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:33,677 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 10:31:33,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:31:33,677 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 10:31:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:31:33,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:33,677 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-30 10:31:33,678 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:33,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:33,678 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-30 10:31:33,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:33,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:33,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:33,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:33,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:35,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:35,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:35,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:35,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:35,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:35,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:31:35,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:31:35,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:31:35,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:31:35,163 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 10:31:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:35,231 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 10:31:35,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:31:35,232 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 10:31:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:35,233 INFO L225 Difference]: With dead ends: 42 [2018-09-30 10:31:35,233 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:31:35,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:31:35,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:31:35,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:31:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:31:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:31:35,235 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 10:31:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:35,236 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:31:35,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:31:35,236 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:31:35,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:31:35,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:35,236 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-30 10:31:35,236 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:35,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-30 10:31:35,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:35,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:35,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:35,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:35,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:36,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:36,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:36,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:36,087 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:36,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:36,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:36,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:36,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:31:36,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:31:36,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:31:36,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:31:36,118 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-30 10:31:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:36,184 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:31:36,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:31:36,185 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-30 10:31:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:36,185 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:31:36,185 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:31:36,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:31:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:31:36,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 10:31:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:31:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 10:31:36,189 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 10:31:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:36,189 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 10:31:36,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:31:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 10:31:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:31:36,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:36,190 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-30 10:31:36,190 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:36,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:36,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-30 10:31:36,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:36,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:36,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:36,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:36,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:37,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:37,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:37,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:37,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 10:31:37,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:37,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:37,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:37,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:31:37,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:31:37,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:31:37,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:31:37,185 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 10:31:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:37,384 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 10:31:37,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:31:37,385 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 10:31:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:37,386 INFO L225 Difference]: With dead ends: 44 [2018-09-30 10:31:37,386 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:31:37,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:31:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:31:37,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:31:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:31:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:31:37,389 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 10:31:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:37,389 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:31:37,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:31:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:31:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:31:37,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:37,390 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-30 10:31:37,390 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:37,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:37,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-30 10:31:37,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:37,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:37,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:37,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:37,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:38,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:38,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:38,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:38,223 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:38,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:38,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:38,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:38,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:31:38,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:31:38,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:31:38,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:31:38,256 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-30 10:31:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:38,320 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:31:38,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:31:38,321 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-30 10:31:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:38,321 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:31:38,322 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:31:38,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:31:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:31:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 10:31:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:31:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 10:31:38,325 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 10:31:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:38,325 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 10:31:38,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:31:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 10:31:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 10:31:38,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:38,325 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-30 10:31:38,326 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:38,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:38,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-30 10:31:38,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:38,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:38,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:38,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:38,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:39,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:39,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:39,241 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:39,281 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 10:31:39,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:39,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:39,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:39,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:31:39,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:31:39,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:31:39,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:31:39,316 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 10:31:39,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:39,379 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 10:31:39,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:31:39,380 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 10:31:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:39,380 INFO L225 Difference]: With dead ends: 46 [2018-09-30 10:31:39,380 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:31:39,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:31:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:31:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:31:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:31:39,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:31:39,383 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 10:31:39,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:39,384 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:31:39,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:31:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:31:39,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:31:39,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:39,384 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-30 10:31:39,384 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:39,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:39,384 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-30 10:31:39,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:39,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:39,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:39,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:39,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:40,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:40,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:40,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:40,289 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 10:31:40,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:40,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:40,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:40,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:31:40,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:31:40,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:31:40,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:31:40,330 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-30 10:31:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:40,518 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:31:40,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:31:40,518 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-30 10:31:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:40,519 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:31:40,519 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:31:40,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:31:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:31:40,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:31:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:31:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 10:31:40,522 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 10:31:40,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:40,522 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 10:31:40,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:31:40,522 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 10:31:40,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 10:31:40,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:40,523 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-30 10:31:40,523 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:40,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:40,523 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-30 10:31:40,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:40,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:40,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:40,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:40,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:41,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:41,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:41,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:41,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:41,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:41,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:31:41,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:31:41,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:31:41,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:31:41,390 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 10:31:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:41,449 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 10:31:41,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:31:41,450 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 10:31:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:41,450 INFO L225 Difference]: With dead ends: 48 [2018-09-30 10:31:41,450 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:31:41,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:31:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:31:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:31:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:31:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:31:41,453 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 10:31:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:41,453 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:31:41,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:31:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:31:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:31:41,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:41,454 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-30 10:31:41,454 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:41,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:41,454 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-30 10:31:41,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:41,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:41,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:41,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:41,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:42,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:42,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:31:42,528 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:42,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:42,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:42,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:42,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:42,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:31:42,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:31:42,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:31:42,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:31:42,582 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-30 10:31:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:42,638 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:31:42,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:31:42,639 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-30 10:31:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:42,639 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:31:42,640 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 10:31:42,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:31:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 10:31:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 10:31:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:31:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 10:31:42,643 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 10:31:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:42,643 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 10:31:42,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:31:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 10:31:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:31:42,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:42,644 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-30 10:31:42,644 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:42,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-30 10:31:42,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:42,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:42,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:42,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:42,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:43,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:43,721 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 [2018-09-30 10:31:43,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:43,764 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 10:31:43,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:43,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:43,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:43,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:31:43,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:31:43,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:31:43,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:31:43,802 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 10:31:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:44,392 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 10:31:44,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:31:44,392 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 10:31:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:44,393 INFO L225 Difference]: With dead ends: 50 [2018-09-30 10:31:44,393 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:31:44,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:31:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:31:44,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:31:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:31:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:31:44,396 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 10:31:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:44,396 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:31:44,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:31:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:31:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:31:44,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:44,397 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-30 10:31:44,397 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:44,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:44,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-30 10:31:44,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:44,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:44,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:44,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:44,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:45,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:45,295 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 [2018-09-30 10:31:45,302 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:45,331 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:45,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:45,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:45,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:45,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:31:45,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:31:45,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:31:45,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:31:45,376 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-30 10:31:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:45,469 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:31:45,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:31:45,470 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-30 10:31:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:45,470 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:31:45,471 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:31:45,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:31:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:31:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:31:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:31:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 10:31:45,474 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 10:31:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:45,474 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 10:31:45,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:31:45,475 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 10:31:45,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 10:31:45,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:45,475 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-30 10:31:45,475 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:45,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:45,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-30 10:31:45,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:45,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:45,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:45,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:45,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:46,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:46,483 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 [2018-09-30 10:31:46,489 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:46,528 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 10:31:46,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:46,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:46,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:46,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:31:46,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:31:46,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:31:46,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:31:46,567 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 10:31:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:46,647 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 10:31:46,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:31:46,648 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 10:31:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:46,648 INFO L225 Difference]: With dead ends: 52 [2018-09-30 10:31:46,648 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:31:46,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:31:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:31:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:31:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:31:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:31:46,651 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 10:31:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:46,651 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:31:46,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:31:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:31:46,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:31:46,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:46,652 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-30 10:31:46,652 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:46,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:46,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-30 10:31:46,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:46,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:46,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:46,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:46,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:47,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:47,896 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 [2018-09-30 10:31:47,903 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:47,945 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:31:47,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:47,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:47,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:47,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:31:47,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:31:47,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:31:47,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:31:47,989 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-30 10:31:48,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:48,051 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:31:48,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:31:48,051 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-30 10:31:48,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:48,052 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:31:48,052 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:31:48,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:31:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:31:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:31:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:31:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 10:31:48,056 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 10:31:48,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:48,056 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 10:31:48,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:31:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 10:31:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 10:31:48,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:48,057 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-30 10:31:48,057 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:48,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-30 10:31:48,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:48,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:48,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:48,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:48,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:49,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:49,153 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 [2018-09-30 10:31:49,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:49,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:49,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:49,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:31:49,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:31:49,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:31:49,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:31:49,228 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 10:31:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:49,302 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 10:31:49,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:31:49,302 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 10:31:49,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:49,303 INFO L225 Difference]: With dead ends: 54 [2018-09-30 10:31:49,303 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:31:49,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:31:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:31:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:31:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:31:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:31:49,307 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 10:31:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:49,308 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:31:49,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:31:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:31:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:31:49,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:49,308 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-30 10:31:49,308 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:49,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:49,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-30 10:31:49,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:49,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:49,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:49,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:49,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:50,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:50,265 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 [2018-09-30 10:31:50,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:50,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:50,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:50,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:50,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:50,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:31:50,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:31:50,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:31:50,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:31:50,352 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-30 10:31:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:50,464 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:31:50,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:31:50,465 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-30 10:31:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:50,465 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:31:50,466 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 10:31:50,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:31:50,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 10:31:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 10:31:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:31:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 10:31:50,468 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 10:31:50,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:50,469 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 10:31:50,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:31:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 10:31:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:31:50,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:50,470 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-30 10:31:50,470 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:50,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:50,470 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-30 10:31:50,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:50,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:50,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:50,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:51,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:51,498 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 [2018-09-30 10:31:51,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:31:51,580 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 10:31:51,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:51,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:51,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:51,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:31:51,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:31:51,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:31:51,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:31:51,614 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 10:31:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:51,727 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 10:31:51,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:31:51,727 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 10:31:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:51,728 INFO L225 Difference]: With dead ends: 56 [2018-09-30 10:31:51,728 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:31:51,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:31:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:31:51,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:31:51,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:31:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:31:51,731 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 10:31:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:51,732 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:31:51,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:31:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:31:51,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:31:51,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:51,733 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-30 10:31:51,733 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:51,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:51,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-30 10:31:51,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:51,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:51,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:51,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:51,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:53,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:53,781 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 [2018-09-30 10:31:53,789 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:31:53,821 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:31:53,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:53,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:53,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:53,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:31:53,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:31:53,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:31:53,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:31:53,867 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-30 10:31:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:54,075 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:31:54,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:31:54,076 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-30 10:31:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:54,076 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:31:54,077 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:31:54,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:31:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:31:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:31:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:31:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 10:31:54,081 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 10:31:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:54,081 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 10:31:54,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:31:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 10:31:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 10:31:54,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:54,082 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-30 10:31:54,082 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:54,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:54,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-30 10:31:54,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:54,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:54,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:54,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:54,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:55,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:55,169 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 [2018-09-30 10:31:55,177 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:31:55,223 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 10:31:55,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:55,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:55,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:55,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:31:55,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:31:55,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:31:55,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:31:55,263 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 10:31:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:55,363 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 10:31:55,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:31:55,363 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 10:31:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:55,364 INFO L225 Difference]: With dead ends: 58 [2018-09-30 10:31:55,364 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:31:55,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:31:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:31:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:31:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:31:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:31:55,368 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 10:31:55,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:55,369 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:31:55,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:31:55,369 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:31:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:31:55,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:55,369 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-30 10:31:55,370 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:55,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:55,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-30 10:31:55,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:55,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:55,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:55,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:55,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:56,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:56,496 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 [2018-09-30 10:31:56,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:31:56,547 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 10:31:56,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:56,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:56,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:56,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:31:56,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:31:56,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:31:56,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:31:56,579 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-30 10:31:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:56,669 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:31:56,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:31:56,669 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-30 10:31:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:56,670 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:31:56,670 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:31:56,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:31:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:31:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:31:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:31:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 10:31:56,673 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 10:31:56,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:56,673 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 10:31:56,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:31:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 10:31:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 10:31:56,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:56,674 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-30 10:31:56,674 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:56,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-30 10:31:56,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:56,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:56,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:56,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:56,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:58,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:58,133 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 [2018-09-30 10:31:58,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:58,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:58,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:58,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:31:58,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:31:58,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:31:58,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:31:58,228 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 10:31:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:58,317 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 10:31:58,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:31:58,318 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 10:31:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:58,319 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:31:58,319 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:31:58,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:31:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:31:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:31:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:31:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:31:58,322 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 10:31:58,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:58,322 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:31:58,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:31:58,323 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:31:58,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:31:58,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:58,323 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-30 10:31:58,323 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:58,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-30 10:31:58,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:58,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:58,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:58,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:31:58,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:31:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:59,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:31:59,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:31:59,597 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:31:59,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:31:59,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:31:59,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:31:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:31:59,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:31:59,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:31:59,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:31:59,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:31:59,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:31:59,662 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-30 10:31:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:31:59,730 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:31:59,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:31:59,731 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-30 10:31:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:31:59,732 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:31:59,732 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 10:31:59,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:31:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 10:31:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 10:31:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:31:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 10:31:59,735 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 10:31:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:31:59,735 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 10:31:59,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:31:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 10:31:59,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:31:59,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:31:59,736 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-30 10:31:59,736 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:31:59,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:31:59,737 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-30 10:31:59,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:31:59,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:31:59,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:59,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:31:59,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:31:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:01,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:01,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:32:01,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:01,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 10:32:01,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:01,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:01,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:01,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:32:01,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:32:01,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:32:01,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:32:01,319 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 10:32:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:01,481 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 10:32:01,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:32:01,481 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 10:32:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:01,482 INFO L225 Difference]: With dead ends: 62 [2018-09-30 10:32:01,483 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:32:01,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:32:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:32:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:32:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:32:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:32:01,487 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 10:32:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:01,487 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:32:01,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:32:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:32:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:32:01,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:01,488 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-30 10:32:01,488 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:01,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:01,488 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-30 10:32:01,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:01,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:01,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:01,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:01,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:03,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:03,274 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 [2018-09-30 10:32:03,287 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:03,324 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:03,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:03,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:03,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:03,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:32:03,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:32:03,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:32:03,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:32:03,369 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-30 10:32:03,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:03,489 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:32:03,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:32:03,490 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-30 10:32:03,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:03,490 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:32:03,491 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 10:32:03,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:32:03,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 10:32:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 10:32:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 10:32:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 10:32:03,494 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 10:32:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:03,495 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 10:32:03,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:32:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 10:32:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 10:32:03,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:03,496 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-09-30 10:32:03,496 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:03,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:03,496 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-09-30 10:32:03,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:03,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:03,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:03,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:03,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:05,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:05,175 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 [2018-09-30 10:32:05,182 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:05,230 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 10:32:05,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:05,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:05,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:05,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:32:05,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:32:05,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:32:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:32:05,272 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 10:32:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:05,356 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 10:32:05,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:32:05,357 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 10:32:05,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:05,358 INFO L225 Difference]: With dead ends: 64 [2018-09-30 10:32:05,358 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:32:05,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:32:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:32:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:32:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:32:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:32:05,360 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 10:32:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:05,360 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:32:05,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:32:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:32:05,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:32:05,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:05,361 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-09-30 10:32:05,361 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:05,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:05,362 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-09-30 10:32:05,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:05,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:05,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:05,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:05,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:08,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:08,352 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 [2018-09-30 10:32:08,360 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:08,410 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:32:08,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:08,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:08,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:08,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:32:08,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:32:08,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:32:08,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:32:08,452 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-30 10:32:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:08,532 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:32:08,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:32:08,532 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-30 10:32:08,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:08,533 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:32:08,533 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 10:32:08,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:32:08,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 10:32:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 10:32:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:32:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 10:32:08,536 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 10:32:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:08,537 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 10:32:08,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:32:08,537 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 10:32:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 10:32:08,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:08,537 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-09-30 10:32:08,537 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:08,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-09-30 10:32:08,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:08,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:08,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:08,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:08,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:10,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:10,270 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 [2018-09-30 10:32:10,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:10,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:10,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:10,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 10:32:10,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:32:10,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:32:10,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:32:10,363 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 10:32:10,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:10,473 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 10:32:10,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:32:10,474 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 10:32:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:10,474 INFO L225 Difference]: With dead ends: 66 [2018-09-30 10:32:10,474 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:32:10,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:32:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:32:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:32:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:32:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:32:10,477 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 10:32:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:10,478 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:32:10,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:32:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:32:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:32:10,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:10,478 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-09-30 10:32:10,479 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:10,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:10,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-09-30 10:32:10,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:10,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:10,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:10,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:10,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:11,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:11,914 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 [2018-09-30 10:32:11,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:11,959 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:11,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:11,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:12,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:12,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:32:12,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:32:12,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:32:12,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:32:12,004 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-30 10:32:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:12,170 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:32:12,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:32:12,170 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-30 10:32:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:12,171 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:32:12,171 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 10:32:12,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:32:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 10:32:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 10:32:12,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 10:32:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 10:32:12,175 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 10:32:12,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:12,175 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 10:32:12,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:32:12,175 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 10:32:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:32:12,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:12,176 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-09-30 10:32:12,176 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:12,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:12,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-09-30 10:32:12,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:12,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:12,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:12,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:12,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:14,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:14,273 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 [2018-09-30 10:32:14,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:14,338 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 10:32:14,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:14,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:14,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:14,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:32:14,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:32:14,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:32:14,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:32:14,375 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 10:32:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:14,492 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 10:32:14,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:32:14,492 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 10:32:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:14,493 INFO L225 Difference]: With dead ends: 68 [2018-09-30 10:32:14,493 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:32:14,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:32:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:32:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:32:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:32:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:32:14,497 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 10:32:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:14,497 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:32:14,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:32:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:32:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:32:14,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:14,498 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-09-30 10:32:14,498 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:14,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-09-30 10:32:14,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:14,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:14,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:14,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:14,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:16,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:16,109 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 [2018-09-30 10:32:16,118 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:16,168 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:16,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:16,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:16,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:16,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 10:32:16,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:32:16,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:32:16,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:32:16,218 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-30 10:32:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:16,368 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:32:16,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:32:16,368 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-30 10:32:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:16,369 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:32:16,369 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:32:16,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:32:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:32:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 10:32:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:32:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 10:32:16,372 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 10:32:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:16,373 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 10:32:16,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:32:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 10:32:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 10:32:16,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:16,374 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-09-30 10:32:16,374 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:16,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:16,374 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-09-30 10:32:16,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:16,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:16,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:16,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:16,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:18,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:18,244 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 [2018-09-30 10:32:18,253 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:18,304 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 10:32:18,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:18,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:18,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:18,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:32:18,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:32:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:32:18,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:32:18,354 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 10:32:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:18,451 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 10:32:18,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:32:18,451 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 10:32:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:18,452 INFO L225 Difference]: With dead ends: 70 [2018-09-30 10:32:18,452 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:32:18,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:32:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:32:18,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:32:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:32:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:32:18,456 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 10:32:18,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:18,456 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:32:18,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:32:18,456 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:32:18,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:32:18,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:18,457 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-09-30 10:32:18,457 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:18,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:18,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-09-30 10:32:18,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:18,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:18,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:18,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:18,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:20,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:20,052 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 [2018-09-30 10:32:20,068 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:20,179 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 10:32:20,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:20,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:20,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:20,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:32:20,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:32:20,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:32:20,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:32:20,216 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-30 10:32:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:20,333 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:32:20,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:32:20,333 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-30 10:32:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:20,334 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:32:20,334 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:32:20,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:32:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:32:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 10:32:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:32:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 10:32:20,337 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 10:32:20,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:20,337 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 10:32:20,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:32:20,337 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 10:32:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 10:32:20,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:20,338 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-09-30 10:32:20,338 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:20,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:20,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-09-30 10:32:20,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:20,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:20,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:20,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:20,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:22,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:22,001 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 [2018-09-30 10:32:22,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:22,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:22,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:22,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 10:32:22,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:32:22,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:32:22,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:32:22,099 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 10:32:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:22,330 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 10:32:22,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:32:22,330 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 10:32:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:22,331 INFO L225 Difference]: With dead ends: 72 [2018-09-30 10:32:22,331 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:32:22,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:32:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:32:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:32:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:32:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:32:22,335 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 10:32:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:22,335 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:32:22,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:32:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:32:22,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:32:22,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:22,336 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-09-30 10:32:22,336 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:22,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-09-30 10:32:22,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:22,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:22,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:22,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:22,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:24,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:24,242 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 [2018-09-30 10:32:24,249 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:24,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:24,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:24,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:24,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:24,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:32:24,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:32:24,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:32:24,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:32:24,330 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-30 10:32:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:24,430 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:32:24,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:32:24,431 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-30 10:32:24,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:24,432 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:32:24,432 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 10:32:24,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:32:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 10:32:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 10:32:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 10:32:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 10:32:24,436 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 10:32:24,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:24,436 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 10:32:24,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:32:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 10:32:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 10:32:24,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:24,437 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-09-30 10:32:24,437 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:24,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:24,437 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-09-30 10:32:24,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:24,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:24,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:24,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:26,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:26,198 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 [2018-09-30 10:32:26,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:26,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 10:32:26,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:26,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:26,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:26,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:32:26,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:32:26,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:32:26,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:32:26,301 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 10:32:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:26,437 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 10:32:26,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:32:26,438 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 10:32:26,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:26,439 INFO L225 Difference]: With dead ends: 74 [2018-09-30 10:32:26,439 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:32:26,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:32:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:32:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:32:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:32:26,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:32:26,442 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 10:32:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:26,443 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:32:26,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:32:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:32:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:32:26,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:26,443 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-09-30 10:32:26,444 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:26,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-09-30 10:32:26,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:26,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:26,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:26,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:26,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:28,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:28,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:32:28,550 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:28,593 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:28,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:28,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:28,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:28,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 10:32:28,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:32:28,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:32:28,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:32:28,649 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-30 10:32:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:30,397 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:32:30,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:32:30,397 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-30 10:32:30,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:30,398 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:32:30,398 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:32:30,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:32:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:32:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 10:32:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 10:32:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 10:32:30,402 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 10:32:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:30,402 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 10:32:30,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:32:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 10:32:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 10:32:30,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:30,403 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-09-30 10:32:30,403 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:30,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-09-30 10:32:30,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:30,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:30,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:30,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:30,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:33,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:33,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:32:33,434 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:32:33,503 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 10:32:33,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:33,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:33,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:33,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 10:32:33,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:32:33,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:32:33,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:32:33,552 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 10:32:33,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:33,750 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 10:32:33,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:32:33,750 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 10:32:33,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:33,751 INFO L225 Difference]: With dead ends: 76 [2018-09-30 10:32:33,751 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:32:33,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:32:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:32:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:32:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:32:33,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:32:33,755 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 10:32:33,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:33,756 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:32:33,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:32:33,756 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:32:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:32:33,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:33,756 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-09-30 10:32:33,757 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:33,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:33,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-09-30 10:32:33,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:33,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:33,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:33,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:33,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:35,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:35,744 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 [2018-09-30 10:32:35,751 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:35,816 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:32:35,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:35,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:35,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:35,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 10:32:35,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:32:35,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:32:35,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:32:35,867 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-30 10:32:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:36,184 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:32:36,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:32:36,184 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-30 10:32:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:36,185 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:32:36,185 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 10:32:36,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:32:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 10:32:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 10:32:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:32:36,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 10:32:36,190 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 10:32:36,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:36,190 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 10:32:36,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:32:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 10:32:36,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 10:32:36,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:36,191 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-09-30 10:32:36,191 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:36,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:36,191 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-09-30 10:32:36,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:36,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:36,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:36,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:36,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:38,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:38,562 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 [2018-09-30 10:32:38,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:38,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:38,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:38,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 10:32:38,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:32:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:32:38,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:32:38,658 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 10:32:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:38,799 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 10:32:38,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:32:38,800 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 10:32:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:38,801 INFO L225 Difference]: With dead ends: 78 [2018-09-30 10:32:38,801 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:32:38,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:32:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:32:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:32:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:32:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 10:32:38,804 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 10:32:38,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:38,804 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 10:32:38,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:32:38,805 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 10:32:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:32:38,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:38,805 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-09-30 10:32:38,805 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:38,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-09-30 10:32:38,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:38,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:38,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:38,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:38,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:40,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:40,870 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 [2018-09-30 10:32:40,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:40,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:40,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:40,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:40,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:40,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 10:32:40,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:32:40,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:32:40,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:32:40,966 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-30 10:32:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:41,168 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 10:32:41,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:32:41,168 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-30 10:32:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:41,169 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:32:41,169 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 10:32:41,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:32:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 10:32:41,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 10:32:41,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 10:32:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 10:32:41,171 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 10:32:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:41,172 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 10:32:41,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:32:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 10:32:41,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 10:32:41,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:41,173 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-09-30 10:32:41,173 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:41,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-09-30 10:32:41,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:41,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:41,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:41,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:41,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:43,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:43,805 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 [2018-09-30 10:32:43,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:32:43,879 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 10:32:43,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:43,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:43,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:43,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 10:32:43,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:32:43,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:32:43,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:32:43,917 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 10:32:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:44,021 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 10:32:44,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:32:44,021 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 10:32:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:44,022 INFO L225 Difference]: With dead ends: 80 [2018-09-30 10:32:44,022 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:32:44,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:32:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:32:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:32:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:32:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 10:32:44,026 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 10:32:44,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:44,026 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 10:32:44,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:32:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 10:32:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:32:44,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:44,026 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-09-30 10:32:44,027 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:44,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-09-30 10:32:44,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:44,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:44,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:44,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:44,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:46,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:46,072 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 [2018-09-30 10:32:46,080 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:32:46,124 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:32:46,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:46,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:46,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:46,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 10:32:46,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:32:46,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:32:46,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:32:46,167 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-30 10:32:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:47,054 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 10:32:47,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:32:47,054 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-30 10:32:47,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:47,055 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:32:47,055 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 10:32:47,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:32:47,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 10:32:47,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 10:32:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 10:32:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 10:32:47,058 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 10:32:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:47,058 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 10:32:47,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 10:32:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 10:32:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 10:32:47,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:47,059 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-09-30 10:32:47,060 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:47,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:47,061 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-09-30 10:32:47,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:47,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:47,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:47,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:47,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:50,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:50,026 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) [2018-09-30 10:32:50,035 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:32:50,103 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 10:32:50,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:50,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:50,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:50,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 10:32:50,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:32:50,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:32:50,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:32:50,144 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 10:32:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:50,374 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 10:32:50,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:32:50,374 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 10:32:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:50,375 INFO L225 Difference]: With dead ends: 82 [2018-09-30 10:32:50,375 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:32:50,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:32:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:32:50,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:32:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:32:50,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 10:32:50,378 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 10:32:50,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:50,378 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 10:32:50,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:32:50,378 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 10:32:50,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:32:50,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:50,379 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-09-30 10:32:50,379 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:50,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:50,379 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-09-30 10:32:50,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:50,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:50,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:50,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:50,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:52,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:52,580 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 [2018-09-30 10:32:52,587 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:32:52,656 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 10:32:52,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:52,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:52,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:52,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 10:32:52,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 10:32:52,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 10:32:52,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:32:52,696 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-30 10:32:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:52,859 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 10:32:52,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:32:52,859 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-30 10:32:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:52,860 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:32:52,861 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:32:52,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:32:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:32:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 10:32:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 10:32:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 10:32:52,864 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 10:32:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:52,865 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 10:32:52,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 10:32:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 10:32:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 10:32:52,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:52,866 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-09-30 10:32:52,866 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:52,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:52,866 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-09-30 10:32:52,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:52,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:52,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:52,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:52,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:55,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:55,490 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 [2018-09-30 10:32:55,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:55,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:55,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:55,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 10:32:55,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:32:55,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:32:55,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:32:55,597 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 10:32:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:55,851 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 10:32:55,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:32:55,851 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 10:32:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:55,852 INFO L225 Difference]: With dead ends: 84 [2018-09-30 10:32:55,852 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:32:55,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:32:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:32:55,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:32:55,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:32:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 10:32:55,856 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 10:32:55,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:55,856 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 10:32:55,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:32:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 10:32:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:32:55,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:55,857 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-09-30 10:32:55,857 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:55,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-09-30 10:32:55,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:55,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:55,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:55,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:32:55,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:32:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:58,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:32:58,204 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 [2018-09-30 10:32:58,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:32:58,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:32:58,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:32:58,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:32:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:32:58,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:32:58,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 10:32:58,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 10:32:58,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 10:32:58,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:32:58,294 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-30 10:32:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:32:58,420 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 10:32:58,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:32:58,420 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-30 10:32:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:32:58,421 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:32:58,421 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 10:32:58,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:32:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 10:32:58,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 10:32:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 10:32:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 10:32:58,423 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 10:32:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:32:58,423 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 10:32:58,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 10:32:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 10:32:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 10:32:58,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:32:58,424 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-09-30 10:32:58,424 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:32:58,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:32:58,424 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-09-30 10:32:58,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:32:58,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:32:58,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:58,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:32:58,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:32:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:01,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:01,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:01,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:01,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 10:33:01,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:01,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:01,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:01,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 10:33:01,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:33:01,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:33:01,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:33:01,242 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-30 10:33:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:01,366 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 10:33:01,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 10:33:01,367 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-30 10:33:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:01,367 INFO L225 Difference]: With dead ends: 86 [2018-09-30 10:33:01,368 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:33:01,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:33:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:33:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:33:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:33:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 10:33:01,371 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 10:33:01,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:01,371 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 10:33:01,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:33:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 10:33:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:33:01,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:01,372 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1] [2018-09-30 10:33:01,372 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:01,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:01,372 INFO L82 PathProgramCache]: Analyzing trace with hash 956131591, now seen corresponding path program 82 times [2018-09-30 10:33:01,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:01,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:01,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:01,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:01,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:04,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:04,182 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 [2018-09-30 10:33:04,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:04,238 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:04,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:04,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:04,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:04,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 10:33:04,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 10:33:04,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 10:33:04,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 10:33:04,280 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-09-30 10:33:04,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:04,422 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 10:33:04,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 10:33:04,422 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-09-30 10:33:04,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:04,423 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:33:04,423 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 10:33:04,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 10:33:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 10:33:04,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 10:33:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 10:33:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 10:33:04,427 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 10:33:04,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:04,427 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 10:33:04,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 10:33:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 10:33:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 10:33:04,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:04,428 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1] [2018-09-30 10:33:04,428 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:04,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:04,428 INFO L82 PathProgramCache]: Analyzing trace with hash -424691807, now seen corresponding path program 83 times [2018-09-30 10:33:04,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:04,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:04,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:04,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:04,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:06,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:06,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:06,845 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:06,932 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 10:33:06,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:06,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:06,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:06,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 10:33:06,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:33:06,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:33:06,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:33:06,987 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-30 10:33:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:07,263 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 10:33:07,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 10:33:07,263 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-30 10:33:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:07,264 INFO L225 Difference]: With dead ends: 88 [2018-09-30 10:33:07,264 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 10:33:07,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:33:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 10:33:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 10:33:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 10:33:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 10:33:07,267 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 10:33:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:07,267 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 10:33:07,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:33:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 10:33:07,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:33:07,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:07,268 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1] [2018-09-30 10:33:07,268 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:07,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:07,268 INFO L82 PathProgramCache]: Analyzing trace with hash -280544185, now seen corresponding path program 84 times [2018-09-30 10:33:07,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:07,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:07,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:07,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:07,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:10,355 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 [2018-09-30 10:33:10,363 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:10,436 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 10:33:10,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:10,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:10,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:10,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 10:33:10,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 10:33:10,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 10:33:10,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:33:10,493 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-09-30 10:33:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:10,639 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 10:33:10,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 10:33:10,640 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-09-30 10:33:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:10,641 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:33:10,641 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 10:33:10,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:33:10,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 10:33:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 10:33:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 10:33:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 10:33:10,644 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 10:33:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:10,645 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 10:33:10,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 10:33:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 10:33:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 10:33:10,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:10,646 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1] [2018-09-30 10:33:10,646 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:10,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:10,646 INFO L82 PathProgramCache]: Analyzing trace with hash -106935199, now seen corresponding path program 85 times [2018-09-30 10:33:10,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:10,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:10,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:10,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:13,279 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 [2018-09-30 10:33:13,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:13,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:13,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:13,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 10:33:13,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:33:13,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:33:13,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:33:13,391 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-30 10:33:13,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:13,591 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 10:33:13,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 10:33:13,592 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-30 10:33:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:13,593 INFO L225 Difference]: With dead ends: 90 [2018-09-30 10:33:13,593 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 10:33:13,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:33:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 10:33:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 10:33:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 10:33:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 10:33:13,597 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 10:33:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:13,597 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 10:33:13,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:33:13,597 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 10:33:13,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:33:13,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:13,598 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1] [2018-09-30 10:33:13,598 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:13,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:13,598 INFO L82 PathProgramCache]: Analyzing trace with hash 979976071, now seen corresponding path program 86 times [2018-09-30 10:33:13,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:13,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:13,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:13,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:13,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:16,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:16,638 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 [2018-09-30 10:33:16,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:16,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:16,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:16,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:16,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:16,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 10:33:16,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 10:33:16,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 10:33:16,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:33:16,738 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-09-30 10:33:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:16,934 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 10:33:16,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:33:16,935 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-09-30 10:33:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:16,935 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:33:16,936 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 10:33:16,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:33:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 10:33:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 10:33:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 10:33:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 10:33:16,938 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 10:33:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:16,939 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 10:33:16,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 10:33:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 10:33:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 10:33:16,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:16,939 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1] [2018-09-30 10:33:16,939 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:16,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:16,940 INFO L82 PathProgramCache]: Analyzing trace with hash 314487073, now seen corresponding path program 87 times [2018-09-30 10:33:16,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:16,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:16,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:16,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:16,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:20,190 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 [2018-09-30 10:33:20,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:20,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 10:33:20,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:20,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:20,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:20,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 10:33:20,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:33:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:33:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:33:20,322 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-30 10:33:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:20,488 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 10:33:20,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 10:33:20,488 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-30 10:33:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:20,489 INFO L225 Difference]: With dead ends: 92 [2018-09-30 10:33:20,489 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:33:20,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:33:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:33:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:33:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:33:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 10:33:20,492 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 10:33:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:20,492 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 10:33:20,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:33:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 10:33:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:33:20,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:20,492 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1] [2018-09-30 10:33:20,493 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:20,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:20,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164615, now seen corresponding path program 88 times [2018-09-30 10:33:20,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:20,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:20,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:20,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:23,223 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 [2018-09-30 10:33:23,229 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:23,284 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:23,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:23,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:23,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:23,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 10:33:23,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 10:33:23,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 10:33:23,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:33:23,325 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-09-30 10:33:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:23,476 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 10:33:23,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 10:33:23,477 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-09-30 10:33:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:23,477 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:33:23,478 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 10:33:23,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:33:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 10:33:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 10:33:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 10:33:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 10:33:23,480 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 10:33:23,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:23,481 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 10:33:23,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 10:33:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 10:33:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 10:33:23,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:23,481 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1] [2018-09-30 10:33:23,481 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:23,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:23,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364641, now seen corresponding path program 89 times [2018-09-30 10:33:23,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:23,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:23,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:23,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:26,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:26,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:26,552 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:26,635 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 10:33:26,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:26,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:26,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:26,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 10:33:26,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:33:26,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:33:26,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:33:26,677 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-30 10:33:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:26,902 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 10:33:26,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 10:33:26,903 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-30 10:33:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:26,904 INFO L225 Difference]: With dead ends: 94 [2018-09-30 10:33:26,904 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 10:33:26,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:33:26,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 10:33:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 10:33:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 10:33:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 10:33:26,907 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 10:33:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:26,908 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 10:33:26,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:33:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 10:33:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:33:26,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:26,909 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1] [2018-09-30 10:33:26,909 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:26,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:26,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663559, now seen corresponding path program 90 times [2018-09-30 10:33:26,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:26,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:26,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:26,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:26,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:30,186 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 [2018-09-30 10:33:30,194 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:30,338 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 10:33:30,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:30,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:30,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:30,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 10:33:30,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 10:33:30,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 10:33:30,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 10:33:30,395 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-09-30 10:33:30,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:30,562 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 10:33:30,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 10:33:30,562 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-09-30 10:33:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:30,563 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:33:30,563 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 10:33:30,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 10:33:30,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 10:33:30,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 10:33:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 10:33:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 10:33:30,567 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 10:33:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:30,567 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 10:33:30,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 10:33:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 10:33:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 10:33:30,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:30,568 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1] [2018-09-30 10:33:30,568 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:30,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:30,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930017, now seen corresponding path program 91 times [2018-09-30 10:33:30,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:30,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:30,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:30,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:30,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:33,688 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 [2018-09-30 10:33:33,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:33,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:33,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:33,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 10:33:33,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:33:33,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:33:33,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:33:33,781 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-30 10:33:33,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:33,919 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 10:33:33,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 10:33:33,919 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-30 10:33:33,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:33,920 INFO L225 Difference]: With dead ends: 96 [2018-09-30 10:33:33,921 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:33:33,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:33:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:33:33,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 10:33:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 10:33:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 10:33:33,925 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 10:33:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:33,925 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 10:33:33,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:33:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 10:33:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 10:33:33,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:33,926 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1] [2018-09-30 10:33:33,926 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:33,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:33,926 INFO L82 PathProgramCache]: Analyzing trace with hash 854092103, now seen corresponding path program 92 times [2018-09-30 10:33:33,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:33,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:33,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:33,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:37,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:37,197 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 [2018-09-30 10:33:37,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:37,253 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:37,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:37,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:37,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:37,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 10:33:37,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 10:33:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 10:33:37,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:33:37,309 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-09-30 10:33:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:38,275 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 10:33:38,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 10:33:38,275 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-09-30 10:33:38,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:38,276 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:33:38,276 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 10:33:38,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:33:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 10:33:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 10:33:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 10:33:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 10:33:38,280 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 10:33:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:38,280 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 10:33:38,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 10:33:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 10:33:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 10:33:38,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:38,280 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1] [2018-09-30 10:33:38,281 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:38,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:38,281 INFO L82 PathProgramCache]: Analyzing trace with hash 707051361, now seen corresponding path program 93 times [2018-09-30 10:33:38,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:38,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:38,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:38,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:38,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:42,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:42,032 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 [2018-09-30 10:33:42,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:42,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 10:33:42,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:42,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:42,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:42,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 10:33:42,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:33:42,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:33:42,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:33:42,182 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-30 10:33:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:42,427 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 10:33:42,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 10:33:42,427 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-30 10:33:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:42,428 INFO L225 Difference]: With dead ends: 98 [2018-09-30 10:33:42,428 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:33:42,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:33:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:33:42,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 10:33:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:33:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 10:33:42,431 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 10:33:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:42,432 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 10:33:42,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:33:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 10:33:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:33:42,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:42,433 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1] [2018-09-30 10:33:42,433 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:42,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:42,433 INFO L82 PathProgramCache]: Analyzing trace with hash 443755655, now seen corresponding path program 94 times [2018-09-30 10:33:42,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:42,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:42,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:42,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:45,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:45,812 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 [2018-09-30 10:33:45,819 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:45,873 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:45,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:45,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:45,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:45,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 10:33:45,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 10:33:45,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 10:33:45,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 10:33:45,916 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-09-30 10:33:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:46,164 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 10:33:46,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 10:33:46,164 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-09-30 10:33:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:46,165 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:33:46,165 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 10:33:46,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 10:33:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 10:33:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 10:33:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 10:33:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 10:33:46,170 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 10:33:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:46,170 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 10:33:46,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 10:33:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 10:33:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 10:33:46,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:46,171 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1] [2018-09-30 10:33:46,171 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:46,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:46,171 INFO L82 PathProgramCache]: Analyzing trace with hash 871523361, now seen corresponding path program 95 times [2018-09-30 10:33:46,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:46,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:46,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:46,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:46,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:49,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:49,328 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 [2018-09-30 10:33:49,336 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:49,427 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 10:33:49,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:49,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:49,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:49,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 10:33:49,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:33:49,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:33:49,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:33:49,494 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-30 10:33:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:49,782 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 10:33:49,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 10:33:49,782 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-30 10:33:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:49,783 INFO L225 Difference]: With dead ends: 100 [2018-09-30 10:33:49,783 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:33:49,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:33:49,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:33:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 10:33:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 10:33:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 10:33:49,785 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 10:33:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:49,785 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 10:33:49,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:33:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 10:33:49,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:33:49,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:49,786 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1] [2018-09-30 10:33:49,786 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:49,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420359, now seen corresponding path program 96 times [2018-09-30 10:33:49,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:49,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:49,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:49,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:49,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:53,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:53,249 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 [2018-09-30 10:33:53,256 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:53,342 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 10:33:53,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:53,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:53,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:53,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 10:33:53,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 10:33:53,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 10:33:53,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 10:33:53,385 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-09-30 10:33:53,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:53,552 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 10:33:53,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 10:33:53,553 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-09-30 10:33:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:53,553 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:33:53,554 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 10:33:53,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 10:33:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 10:33:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 10:33:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 10:33:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 10:33:53,557 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 10:33:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:53,557 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 10:33:53,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 10:33:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 10:33:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 10:33:53,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:53,558 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1] [2018-09-30 10:33:53,558 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:53,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:53,559 INFO L82 PathProgramCache]: Analyzing trace with hash 15325409, now seen corresponding path program 97 times [2018-09-30 10:33:53,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:53,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:53,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:53,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:57,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:57,079 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 [2018-09-30 10:33:57,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:57,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:57,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:57,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 10:33:57,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:33:57,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:33:57,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:33:57,182 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-30 10:33:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:57,335 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 10:33:57,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 10:33:57,336 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-30 10:33:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:57,337 INFO L225 Difference]: With dead ends: 102 [2018-09-30 10:33:57,337 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:33:57,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:33:57,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:33:57,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:33:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:33:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 10:33:57,340 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 10:33:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:57,340 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 10:33:57,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:33:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 10:33:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:33:57,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:57,341 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1] [2018-09-30 10:33:57,341 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:57,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:57,341 INFO L82 PathProgramCache]: Analyzing trace with hash 475087623, now seen corresponding path program 98 times [2018-09-30 10:33:57,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:57,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:57,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:57,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:57,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:01,123 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 [2018-09-30 10:34:01,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:01,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:01,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:01,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:01,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 10:34:01,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 10:34:01,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 10:34:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:34:01,234 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-09-30 10:34:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:01,423 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 10:34:01,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 10:34:01,423 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-09-30 10:34:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:01,424 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:34:01,425 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 10:34:01,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:34:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 10:34:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 10:34:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 10:34:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 10:34:01,428 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 10:34:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:01,429 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 10:34:01,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 10:34:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 10:34:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 10:34:01,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:01,429 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1] [2018-09-30 10:34:01,429 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:01,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:01,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814369, now seen corresponding path program 99 times [2018-09-30 10:34:01,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:01,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:01,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:01,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:04,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:04,906 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:04,914 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:05,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 10:34:05,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:05,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:05,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:05,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 10:34:05,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:34:05,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:34:05,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:34:05,061 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-30 10:34:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:05,337 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 10:34:05,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 10:34:05,338 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-30 10:34:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:05,339 INFO L225 Difference]: With dead ends: 104 [2018-09-30 10:34:05,339 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 10:34:05,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:34:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 10:34:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 10:34:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 10:34:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 10:34:05,342 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 10:34:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:05,343 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 10:34:05,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:34:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 10:34:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 10:34:05,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:05,343 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1] [2018-09-30 10:34:05,344 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:05,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670535, now seen corresponding path program 100 times [2018-09-30 10:34:05,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:05,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:05,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:05,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:05,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:10,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:10,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:34:10,727 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:10,791 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:10,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:10,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:11,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:11,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 10:34:11,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 10:34:11,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 10:34:11,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:34:11,069 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-09-30 10:34:17,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:17,465 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 10:34:17,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 10:34:17,465 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-09-30 10:34:17,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:17,466 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:34:17,466 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 10:34:17,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:34:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 10:34:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 10:34:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 10:34:17,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 10:34:17,474 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 10:34:17,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:17,474 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 10:34:17,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 10:34:17,475 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 10:34:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 10:34:17,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:17,475 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1] [2018-09-30 10:34:17,476 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:17,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:17,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080865, now seen corresponding path program 101 times [2018-09-30 10:34:17,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:17,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:17,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:17,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:17,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:22,813 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:34:22,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-09-30 10:34:22,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:34:22,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:34:22,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:34:22,815 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-30 10:34:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:23,006 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 10:34:23,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 10:34:23,006 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-30 10:34:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:23,006 INFO L225 Difference]: With dead ends: 104 [2018-09-30 10:34:23,006 INFO L226 Difference]: Without dead ends: 0 [2018-09-30 10:34:23,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:34:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-30 10:34:23,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-30 10:34:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-30 10:34:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-30 10:34:23,008 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2018-09-30 10:34:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:23,008 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-30 10:34:23,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:34:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-30 10:34:23,009 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-30 10:34:23,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-30 10:34:23,147 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 610 [2018-09-30 10:34:25,344 WARN L178 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 610 [2018-09-30 10:34:25,354 INFO L426 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 29) no Hoare annotation was computed. [2018-09-30 10:34:25,355 INFO L426 ceAbstractionStarter]: For program point mainENTRY(lines 17 31) no Hoare annotation was computed. [2018-09-30 10:34:25,355 INFO L426 ceAbstractionStarter]: For program point mainFINAL(lines 17 31) no Hoare annotation was computed. [2018-09-30 10:34:25,355 INFO L426 ceAbstractionStarter]: For program point mainEXIT(lines 17 31) no Hoare annotation was computed. [2018-09-30 10:34:25,358 INFO L422 ceAbstractionStarter]: At program point L24-1(lines 24 27) the Hoare annotation is: (or (and (<= main_x 49) (<= main_y 49) (<= 49 main_x) (<= 49 main_y)) (and (<= 8 main_y) (<= main_y 8) (<= main_x 8) (<= 8 main_x)) (and (<= 99 main_x) (<= main_y 99) (<= 99 main_y) (<= main_x 99)) (and (<= 42 main_x) (<= main_y 42) (<= main_x 42) (<= 42 main_y)) (and (<= 59 main_x) (<= 59 main_y) (<= main_y 59) (<= main_x 59)) (and (<= 9 main_y) (<= 9 main_x) (<= main_x 9) (<= main_y 9)) (and (<= 55 main_y) (<= main_y 55) (<= 55 main_x) (<= main_x 55)) (and (<= 74 main_x) (<= main_x 74) (<= 74 main_y) (<= main_y 74)) (and (<= main_x 97) (<= 97 main_y) (<= main_y 97) (<= 97 main_x)) (and (<= 12 main_x) (<= 12 main_y) (<= main_y 12) (<= main_x 12)) (and (<= main_x 65) (<= main_y 65) (<= 65 main_x) (<= 65 main_y)) (and (<= 32 main_x) (<= main_x 32) (<= 32 main_y) (<= main_y 32)) (and (<= main_y 73) (<= main_x 73) (<= 73 main_x) (<= 73 main_y)) (and (<= 6 main_x) (<= main_x 6) (<= 6 main_y) (<= main_y 6)) (and (<= 14 main_x) (<= 14 main_y) (<= main_y 14) (<= main_x 14)) (and (<= main_x 0) (<= 0 main_y) (<= 0 main_x) (<= main_y 0)) (and (<= main_y 44) (<= main_x 44) (<= 44 main_y) (<= 44 main_x)) (and (<= 38 main_x) (<= 38 main_y) (<= main_y 38) (<= main_x 38)) (and (<= 43 main_x) (<= main_x 43) (<= main_y 43) (<= 43 main_y)) (and (<= 21 main_y) (<= 21 main_x) (<= main_x 21) (<= main_y 21)) (and (<= 94 main_x) (<= 94 main_y) (<= main_x 94) (<= main_y 94)) (and (<= 52 main_x) (<= 52 main_y) (<= main_y 52) (<= main_x 52)) (and (<= main_y 46) (<= 46 main_x) (<= main_x 46) (<= 46 main_y)) (and (<= main_x 18) (<= 18 main_y) (<= 18 main_x) (<= main_y 18)) (and (<= 61 main_y) (<= main_x 61) (<= main_y 61) (<= 61 main_x)) (<= 101 main_x) (and (<= 88 main_y) (<= main_y 88) (<= 88 main_x) (<= main_x 88)) (and (<= 80 main_y) (<= main_x 80) (<= main_y 80) (<= 80 main_x)) (and (<= main_x 92) (<= 92 main_y) (<= main_y 92) (<= 92 main_x)) (and (<= 87 main_x) (<= main_x 87) (<= 87 main_y) (<= main_y 87)) (and (<= 35 main_y) (<= main_y 35) (<= main_x 35) (<= 35 main_x)) (and (<= 85 main_x) (<= main_x 85) (<= 85 main_y) (<= main_y 85)) (and (<= 63 main_x) (<= 63 main_y) (<= main_y 63) (<= main_x 63)) (and (<= 15 main_y) (<= main_y 15) (<= 15 main_x) (<= main_x 15)) (and (<= main_y 64) (<= 64 main_x) (<= main_x 64) (<= 64 main_y)) (and (<= 47 main_x) (<= 47 main_y) (<= main_y 47) (<= main_x 47)) (and (<= 51 main_y) (<= main_x 51) (<= 51 main_x) (<= main_y 51)) (and (<= 4 main_y) (<= main_y 4) (<= main_x 4) (<= 4 main_x)) (and (<= 54 main_y) (<= main_y 54) (<= 54 main_x) (<= main_x 54)) (and (<= main_x 33) (<= 33 main_x) (<= main_y 33) (<= 33 main_y)) (and (<= 37 main_x) (<= 37 main_y) (<= main_y 37) (<= main_x 37)) (and (<= 20 main_y) (<= 20 main_x) (<= main_y 20) (<= main_x 20)) (and (<= 26 main_y) (<= main_x 26) (<= 26 main_x) (<= main_y 26)) (and (<= 86 main_x) (<= 86 main_y) (<= main_x 86) (<= main_y 86)) (and (<= main_x 27) (<= main_y 27) (<= 27 main_y) (<= 27 main_x)) (and (<= main_y 95) (<= 95 main_x) (<= 95 main_y) (<= main_x 95)) (and (<= main_x 56) (<= 56 main_x) (<= 56 main_y) (<= main_y 56)) (and (<= 1 main_x) (<= main_x 1) (<= main_y 1) (<= 1 main_y)) (and (<= main_y 75) (<= main_x 75) (<= 75 main_y) (<= 75 main_x)) (and (<= main_x 62) (<= 62 main_x) (<= 62 main_y) (<= main_y 62)) (and (<= 68 main_y) (<= main_x 68) (<= main_y 68) (<= 68 main_x)) (and (<= main_y 78) (<= 78 main_x) (<= 78 main_y) (<= main_x 78)) (and (<= main_y 3) (<= 3 main_y) (<= 3 main_x) (<= main_x 3)) (and (<= main_x 36) (<= main_y 36) (<= 36 main_x) (<= 36 main_y)) (and (<= 57 main_y) (<= main_x 57) (<= main_y 57) (<= 57 main_x)) (and (<= main_x 25) (<= main_y 25) (<= 25 main_x) (<= 25 main_y)) (and (<= 5 main_x) (<= main_x 5) (<= main_y 5) (<= 5 main_y)) (and (<= 82 main_x) (<= 82 main_y) (<= main_x 82) (<= main_y 82)) (and (<= main_y 17) (<= 17 main_y) (<= 17 main_x) (<= main_x 17)) (and (<= main_y 83) (<= 83 main_x) (<= main_x 83) (<= 83 main_y)) (and (<= 77 main_x) (<= 77 main_y) (<= main_x 77) (<= main_y 77)) (and (<= 31 main_x) (<= 31 main_y) (<= main_y 31) (<= main_x 31)) (and (<= main_y 98) (<= main_x 98) (<= 98 main_y) (<= 98 main_x)) (and (<= 71 main_y) (<= 71 main_x) (<= main_y 71) (<= main_x 71)) (and (<= main_y 41) (<= 41 main_x) (<= 41 main_y) (<= main_x 41)) (and (<= 30 main_x) (<= 30 main_y) (<= main_x 30) (<= main_y 30)) (and (<= 24 main_y) (<= main_x 24) (<= main_y 24) (<= 24 main_x)) (and (<= main_y 50) (<= 50 main_y) (<= main_x 50) (<= 50 main_x)) (and (<= 84 main_y) (<= main_y 84) (<= main_x 84) (<= 84 main_x)) (and (<= main_y 93) (<= 93 main_y) (<= 93 main_x) (<= main_x 93)) (and (<= main_y 60) (<= main_x 60) (<= 60 main_y) (<= 60 main_x)) (and (<= 29 main_y) (<= main_x 29) (<= 29 main_x) (<= main_y 29)) (and (<= main_y 40) (<= main_x 40) (<= 40 main_y) (<= 40 main_x)) (and (<= main_y 53) (<= 53 main_y) (<= main_x 53) (<= 53 main_x)) (and (<= main_y 58) (<= 58 main_y) (<= 58 main_x) (<= main_x 58)) (and (<= 67 main_x) (<= 67 main_y) (<= main_y 67) (<= main_x 67)) (and (<= main_y 22) (<= main_x 22) (<= 22 main_x) (<= 22 main_y)) (and (<= 39 main_y) (<= 39 main_x) (<= main_x 39) (<= main_y 39)) (and (<= 13 main_x) (<= main_x 13) (<= main_y 13) (<= 13 main_y)) (and (<= main_y 79) (<= 79 main_x) (<= main_x 79) (<= 79 main_y)) (and (<= 69 main_x) (<= main_x 69) (<= 69 main_y) (<= main_y 69)) (and (<= 81 main_x) (<= main_y 81) (<= main_x 81) (<= 81 main_y)) (and (<= 28 main_y) (<= main_x 28) (<= 28 main_x) (<= main_y 28)) (and (<= main_y 66) (<= main_x 66) (<= 66 main_x) (<= 66 main_y)) (and (<= main_x 91) (<= 91 main_y) (<= 91 main_x) (<= main_y 91)) (and (<= 34 main_x) (<= main_y 34) (<= main_x 34) (<= 34 main_y)) (and (<= 89 main_x) (<= main_y 89) (<= main_x 89) (<= 89 main_y)) (and (<= 10 main_y) (<= main_x 10) (<= main_y 10) (<= 10 main_x)) (and (<= main_x 16) (<= main_y 16) (<= 16 main_x) (<= 16 main_y)) (and (<= 100 main_x) (<= main_y 100) (< 99 main_y)) (and (<= 2 main_y) (<= 2 main_x) (<= main_y 2) (<= main_x 2)) (and (<= main_x 7) (<= 7 main_y) (<= 7 main_x) (<= main_y 7)) (and (<= main_x 72) (<= 72 main_x) (<= 72 main_y) (<= main_y 72)) (and (<= 48 main_x) (<= main_x 48) (<= main_y 48) (<= 48 main_y)) (and (<= main_y 76) (<= main_x 76) (<= 76 main_y) (<= 76 main_x)) (and (<= 96 main_x) (<= main_y 96) (<= 96 main_y) (<= main_x 96)) (and (<= 45 main_x) (<= 45 main_y) (<= main_y 45) (<= main_x 45)) (and (<= 11 main_x) (<= main_x 11) (<= 11 main_y) (<= main_y 11)) (and (<= 90 main_x) (<= main_y 90) (<= 90 main_y) (<= main_x 90)) (and (<= main_x 19) (<= main_y 19) (<= 19 main_x) (<= 19 main_y)) (and (<= main_x 70) (<= main_y 70) (<= 70 main_x) (<= 70 main_y)) (and (<= 23 main_x) (<= 23 main_y) (<= main_y 23) (<= main_x 23))) [2018-09-30 10:34:25,389 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:34:25 BoogieIcfgContainer [2018-09-30 10:34:25,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:34:25,390 INFO L168 Benchmark]: Toolchain (without parser) took 193525.08 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 23.6 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -13.8 MB). Peak memory consumption was 612.9 MB. Max. memory is 7.1 GB. [2018-09-30 10:34:25,391 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:34:25,391 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:34:25,391 INFO L168 Benchmark]: Boogie Preprocessor took 24.10 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:34:25,392 INFO L168 Benchmark]: RCFGBuilder took 242.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:34:25,392 INFO L168 Benchmark]: TraceAbstraction took 193207.25 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 23.6 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -34.9 MB). Peak memory consumption was 591.8 MB. Max. memory is 7.1 GB. [2018-09-30 10:34:25,394 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 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.10 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 242.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 193207.25 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 23.6 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -34.9 MB). Peak memory consumption was 591.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((x <= 49 && y <= 49) && 49 <= x) && 49 <= y) || (((8 <= y && y <= 8) && x <= 8) && 8 <= x)) || (((99 <= x && y <= 99) && 99 <= y) && x <= 99)) || (((42 <= x && y <= 42) && x <= 42) && 42 <= y)) || (((59 <= x && 59 <= y) && y <= 59) && x <= 59)) || (((9 <= y && 9 <= x) && x <= 9) && y <= 9)) || (((55 <= y && y <= 55) && 55 <= x) && x <= 55)) || (((74 <= x && x <= 74) && 74 <= y) && y <= 74)) || (((x <= 97 && 97 <= y) && y <= 97) && 97 <= x)) || (((12 <= x && 12 <= y) && y <= 12) && x <= 12)) || (((x <= 65 && y <= 65) && 65 <= x) && 65 <= y)) || (((32 <= x && x <= 32) && 32 <= y) && y <= 32)) || (((y <= 73 && x <= 73) && 73 <= x) && 73 <= y)) || (((6 <= x && x <= 6) && 6 <= y) && y <= 6)) || (((14 <= x && 14 <= y) && y <= 14) && x <= 14)) || (((x <= 0 && 0 <= y) && 0 <= x) && y <= 0)) || (((y <= 44 && x <= 44) && 44 <= y) && 44 <= x)) || (((38 <= x && 38 <= y) && y <= 38) && x <= 38)) || (((43 <= x && x <= 43) && y <= 43) && 43 <= y)) || (((21 <= y && 21 <= x) && x <= 21) && y <= 21)) || (((94 <= x && 94 <= y) && x <= 94) && y <= 94)) || (((52 <= x && 52 <= y) && y <= 52) && x <= 52)) || (((y <= 46 && 46 <= x) && x <= 46) && 46 <= y)) || (((x <= 18 && 18 <= y) && 18 <= x) && y <= 18)) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || 101 <= x) || (((88 <= y && y <= 88) && 88 <= x) && x <= 88)) || (((80 <= y && x <= 80) && y <= 80) && 80 <= x)) || (((x <= 92 && 92 <= y) && y <= 92) && 92 <= x)) || (((87 <= x && x <= 87) && 87 <= y) && y <= 87)) || (((35 <= y && y <= 35) && x <= 35) && 35 <= x)) || (((85 <= x && x <= 85) && 85 <= y) && y <= 85)) || (((63 <= x && 63 <= y) && y <= 63) && x <= 63)) || (((15 <= y && y <= 15) && 15 <= x) && x <= 15)) || (((y <= 64 && 64 <= x) && x <= 64) && 64 <= y)) || (((47 <= x && 47 <= y) && y <= 47) && x <= 47)) || (((51 <= y && x <= 51) && 51 <= x) && y <= 51)) || (((4 <= y && y <= 4) && x <= 4) && 4 <= x)) || (((54 <= y && y <= 54) && 54 <= x) && x <= 54)) || (((x <= 33 && 33 <= x) && y <= 33) && 33 <= y)) || (((37 <= x && 37 <= y) && y <= 37) && x <= 37)) || (((20 <= y && 20 <= x) && y <= 20) && x <= 20)) || (((26 <= y && x <= 26) && 26 <= x) && y <= 26)) || (((86 <= x && 86 <= y) && x <= 86) && y <= 86)) || (((x <= 27 && y <= 27) && 27 <= y) && 27 <= x)) || (((y <= 95 && 95 <= x) && 95 <= y) && x <= 95)) || (((x <= 56 && 56 <= x) && 56 <= y) && y <= 56)) || (((1 <= x && x <= 1) && y <= 1) && 1 <= y)) || (((y <= 75 && x <= 75) && 75 <= y) && 75 <= x)) || (((x <= 62 && 62 <= x) && 62 <= y) && y <= 62)) || (((68 <= y && x <= 68) && y <= 68) && 68 <= x)) || (((y <= 78 && 78 <= x) && 78 <= y) && x <= 78)) || (((y <= 3 && 3 <= y) && 3 <= x) && x <= 3)) || (((x <= 36 && y <= 36) && 36 <= x) && 36 <= y)) || (((57 <= y && x <= 57) && y <= 57) && 57 <= x)) || (((x <= 25 && y <= 25) && 25 <= x) && 25 <= y)) || (((5 <= x && x <= 5) && y <= 5) && 5 <= y)) || (((82 <= x && 82 <= y) && x <= 82) && y <= 82)) || (((y <= 17 && 17 <= y) && 17 <= x) && x <= 17)) || (((y <= 83 && 83 <= x) && x <= 83) && 83 <= y)) || (((77 <= x && 77 <= y) && x <= 77) && y <= 77)) || (((31 <= x && 31 <= y) && y <= 31) && x <= 31)) || (((y <= 98 && x <= 98) && 98 <= y) && 98 <= x)) || (((71 <= y && 71 <= x) && y <= 71) && x <= 71)) || (((y <= 41 && 41 <= x) && 41 <= y) && x <= 41)) || (((30 <= x && 30 <= y) && x <= 30) && y <= 30)) || (((24 <= y && x <= 24) && y <= 24) && 24 <= x)) || (((y <= 50 && 50 <= y) && x <= 50) && 50 <= x)) || (((84 <= y && y <= 84) && x <= 84) && 84 <= x)) || (((y <= 93 && 93 <= y) && 93 <= x) && x <= 93)) || (((y <= 60 && x <= 60) && 60 <= y) && 60 <= x)) || (((29 <= y && x <= 29) && 29 <= x) && y <= 29)) || (((y <= 40 && x <= 40) && 40 <= y) && 40 <= x)) || (((y <= 53 && 53 <= y) && x <= 53) && 53 <= x)) || (((y <= 58 && 58 <= y) && 58 <= x) && x <= 58)) || (((67 <= x && 67 <= y) && y <= 67) && x <= 67)) || (((y <= 22 && x <= 22) && 22 <= x) && 22 <= y)) || (((39 <= y && 39 <= x) && x <= 39) && y <= 39)) || (((13 <= x && x <= 13) && y <= 13) && 13 <= y)) || (((y <= 79 && 79 <= x) && x <= 79) && 79 <= y)) || (((69 <= x && x <= 69) && 69 <= y) && y <= 69)) || (((81 <= x && y <= 81) && x <= 81) && 81 <= y)) || (((28 <= y && x <= 28) && 28 <= x) && y <= 28)) || (((y <= 66 && x <= 66) && 66 <= x) && 66 <= y)) || (((x <= 91 && 91 <= y) && 91 <= x) && y <= 91)) || (((34 <= x && y <= 34) && x <= 34) && 34 <= y)) || (((89 <= x && y <= 89) && x <= 89) && 89 <= y)) || (((10 <= y && x <= 10) && y <= 10) && 10 <= x)) || (((x <= 16 && y <= 16) && 16 <= x) && 16 <= y)) || ((100 <= x && y <= 100) && 99 < y)) || (((2 <= y && 2 <= x) && y <= 2) && x <= 2)) || (((x <= 7 && 7 <= y) && 7 <= x) && y <= 7)) || (((x <= 72 && 72 <= x) && 72 <= y) && y <= 72)) || (((48 <= x && x <= 48) && y <= 48) && 48 <= y)) || (((y <= 76 && x <= 76) && 76 <= y) && 76 <= x)) || (((96 <= x && y <= 96) && 96 <= y) && x <= 96)) || (((45 <= x && 45 <= y) && y <= 45) && x <= 45)) || (((11 <= x && x <= 11) && 11 <= y) && y <= 11)) || (((90 <= x && y <= 90) && 90 <= y) && x <= 90)) || (((x <= 19 && y <= 19) && 19 <= x) && 19 <= y)) || (((x <= 70 && y <= 70) && 70 <= x) && 70 <= y)) || (((23 <= x && 23 <= y) && y <= 23) && x <= 23) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. SAFE Result, 193.1s OverallTime, 102 OverallIterations, 101 TraceHistogramMax, 23.8s AutomataDifference, 0.0s DeadEndRemovalTime, 2.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 204 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 19355 SolverSat, 142 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10403 GetRequests, 5148 SyntacticMatches, 2 SemanticMatches, 5253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 153.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 102 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 102 NumberOfFragments, 1314 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 156.8s InterpolantComputationTime, 10605 NumberOfCodeBlocks, 10605 NumberOfCodeBlocksAsserted, 1494 NumberOfCheckSat, 10403 ConstructedInterpolants, 0 QuantifiedInterpolants, 2204123 SizeOfPredicates, 0 NumberOfNonLiveVariables, 21100 ConjunctsInSsa, 5351 ConjunctsInUnsatCore, 202 InterpolantComputations, 2 PerfectInterpolantSequences, 5151/348551 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEquality-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-34-25-410.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEquality-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-34-25-410.csv Received shutdown request...