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/LuxembourgOctopus.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:58:45,751 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:58:45,752 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:58:45,767 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:58:45,767 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:58:45,768 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:58:45,770 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:58:45,771 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:58:45,773 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:58:45,774 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:58:45,775 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:58:45,775 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:58:45,776 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:58:45,777 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:58:45,778 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:58:45,779 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:58:45,780 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:58:45,782 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:58:45,784 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:58:45,786 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:58:45,787 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:58:45,791 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:58:45,793 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 23:58:45,811 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 23:58:45,838 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:58:45,838 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:58:45,839 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:58:45,839 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:58:45,840 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:58:45,840 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:58:45,840 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:58:45,840 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:58:45,840 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:58:45,841 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:58:45,841 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:58:45,841 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:58:45,841 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:58:45,841 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:58:45,842 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:58:45,842 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:58:45,842 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:58:45,842 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:58:45,842 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:58:45,843 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:58:45,843 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:58:45,843 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:58:45,843 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:58:45,844 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:58:45,844 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:58:45,844 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:58:45,844 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:58:45,844 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:58:45,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:58:45,845 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:58:45,915 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:58:45,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:58:45,935 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:58:45,936 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:58:45,937 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:58:45,938 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl [2018-09-30 23:58:45,938 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl' [2018-09-30 23:58:45,990 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:58:45,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:58:45,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:58:45,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:58:45,995 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:58:46,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:45" (1/1) ... [2018-09-30 23:58:46,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:45" (1/1) ... [2018-09-30 23:58:46,040 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:58:46,041 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:58:46,041 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:58:46,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:58:46,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:58:46,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:58:46,044 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:58:46,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:45" (1/1) ... [2018-09-30 23:58:46,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:45" (1/1) ... [2018-09-30 23:58:46,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:45" (1/1) ... [2018-09-30 23:58:46,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:45" (1/1) ... [2018-09-30 23:58:46,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:45" (1/1) ... [2018-09-30 23:58:46,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:45" (1/1) ... [2018-09-30 23:58:46,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:45" (1/1) ... [2018-09-30 23:58:46,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:58:46,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:58:46,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:58:46,069 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:58:46,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:45" (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 23:58:46,144 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 23:58:46,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 23:58:46,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 23:58:46,352 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:58:46,353 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:58:46 BoogieIcfgContainer [2018-09-30 23:58:46,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:58:46,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:58:46,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:58:46,358 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:58:46,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:58:45" (1/2) ... [2018-09-30 23:58:46,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f74738 and model type LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:58:46, skipping insertion in model container [2018-09-30 23:58:46,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:58:46" (2/2) ... [2018-09-30 23:58:46,361 INFO L112 eAbstractionObserver]: Analyzing ICFG LuxembourgOctopus.bpl [2018-09-30 23:58:46,374 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:58:46,381 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:58:46,427 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:58:46,428 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:58:46,428 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:58:46,428 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:58:46,428 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:58:46,429 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:58:46,429 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:58:46,429 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:58:46,429 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:58:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 23:58:46,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:58:46,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:46,460 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:58:46,461 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:46,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:46,469 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-30 23:58:46,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:46,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:46,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:46,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:46,626 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:58:46,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:58:46,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:58:46,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:58:46,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:58:46,645 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 23:58:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:46,695 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 23:58:46,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:58:46,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 23:58:46,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:46,724 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:58:46,724 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 23:58:46,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:58:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 23:58:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 23:58:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 23:58:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 23:58:46,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 23:58:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:46,796 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 23:58:46,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:58:46,797 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 23:58:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:58:46,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:46,797 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:58:46,798 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:46,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:46,799 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-30 23:58:46,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:46,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:46,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:46,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:46,914 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 23:58:46,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:46,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:46,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:46,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:46,999 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 23:58:47,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:47,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-30 23:58:47,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:58:47,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:58:47,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:58:47,023 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-30 23:58:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:47,062 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 23:58:47,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:58:47,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 23:58:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:47,065 INFO L225 Difference]: With dead ends: 8 [2018-09-30 23:58:47,066 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 23:58:47,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:58:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 23:58:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 23:58:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 23:58:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 23:58:47,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 23:58:47,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:47,075 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 23:58:47,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:58:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 23:58:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:58:47,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:47,076 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 23:58:47,077 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:47,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-30 23:58:47,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:47,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:47,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:47,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:47,150 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 23:58:47,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:47,150 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 23:58:47,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:47,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:47,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:47,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:47,209 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 23:58:47,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:47,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-09-30 23:58:47,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:58:47,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:58:47,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:58:47,231 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 23:58:47,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:47,292 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 23:58:47,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:58:47,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 23:58:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:47,293 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:58:47,293 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:58:47,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:58:47,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:58:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:58:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:58:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:58:47,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 23:58:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:47,297 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:58:47,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:58:47,297 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:58:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:58:47,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:47,298 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 23:58:47,298 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:47,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:47,299 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-30 23:58:47,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:47,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:47,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:47,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:47,419 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 23:58:47,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:47,420 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 23:58:47,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:47,448 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:58:47,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:47,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:47,496 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 23:58:47,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:47,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-30 23:58:47,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:58:47,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:58:47,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:58:47,531 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-30 23:58:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:47,647 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 23:58:47,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:58:47,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-30 23:58:47,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:47,649 INFO L225 Difference]: With dead ends: 10 [2018-09-30 23:58:47,649 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:58:47,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:58:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:58:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 23:58:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:58:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 23:58:47,652 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 23:58:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:47,653 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 23:58:47,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:58:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 23:58:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:58:47,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:47,654 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 23:58:47,654 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:47,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-30 23:58:47,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:47,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:47,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:47,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:47,842 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 23:58:47,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:47,842 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 23:58:47,851 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:47,866 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:47,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:47,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:47,890 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 23:58:47,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:47,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-09-30 23:58:47,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:58:47,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:58:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:58:47,913 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 23:58:47,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:47,960 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:58:47,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:58:47,961 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 23:58:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:47,962 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:58:47,963 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:58:47,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:58:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:58:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:58:47,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:58:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:58:47,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 23:58:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:47,968 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:58:47,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:58:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:58:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:58:47,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:47,969 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 23:58:47,969 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:47,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:47,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-30 23:58:47,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:47,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:47,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:47,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:48,170 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 23:58:48,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:48,171 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 23:58:48,187 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:48,202 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:58:48,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:48,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:48,296 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 23:58:48,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:48,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-30 23:58:48,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:58:48,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:58:48,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:58:48,318 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-30 23:58:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:48,349 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 23:58:48,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:58:48,350 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-30 23:58:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:48,351 INFO L225 Difference]: With dead ends: 12 [2018-09-30 23:58:48,351 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:58:48,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:58:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:58:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:58:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:58:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 23:58:48,355 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 23:58:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:48,356 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 23:58:48,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:58:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 23:58:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:58:48,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:48,357 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 23:58:48,357 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:48,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-30 23:58:48,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:48,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:48,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:48,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:48,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:48,471 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 23:58:48,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:48,472 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 23:58:48,481 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:48,501 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 23:58:48,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:48,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:48,523 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 23:58:48,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:48,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-09-30 23:58:48,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:48,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:48,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:48,554 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 23:58:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:48,581 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:58:48,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:58:48,582 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 23:58:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:48,583 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:58:48,584 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:58:48,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:58:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:58:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:58:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:58:48,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 23:58:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:48,589 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:58:48,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:58:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:58:48,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:48,590 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 23:58:48,590 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:48,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:48,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-30 23:58:48,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:48,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:48,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:48,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:48,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:49,026 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 23:58:49,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:49,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:49,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:49,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:49,064 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 23:58:49,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:49,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-30 23:58:49,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:49,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:49,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:49,087 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-30 23:58:49,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:49,140 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 23:58:49,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:49,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-30 23:58:49,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:49,144 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:58:49,144 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:58:49,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:58:49,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 23:58:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:58:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 23:58:49,148 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 23:58:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:49,148 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 23:58:49,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 23:58:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:58:49,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:49,149 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 23:58:49,149 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:49,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-30 23:58:49,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:49,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:49,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:49,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:49,300 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 23:58:49,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:49,300 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 23:58:49,309 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:49,319 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:49,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:49,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:49,360 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 23:58:49,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:49,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-09-30 23:58:49,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:58:49,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:58:49,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:58:49,383 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 23:58:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:49,417 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:58:49,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:49,417 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 23:58:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:49,418 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:58:49,418 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:58:49,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:58:49,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:58:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:58:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:58:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:58:49,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 23:58:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:49,422 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:58:49,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:58:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:58:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:58:49,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:49,423 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 23:58:49,423 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:49,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-30 23:58:49,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:49,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:49,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:49,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:49,608 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 23:58:49,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:49,609 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 23:58:49,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:49,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:58:49,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:49,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:49,665 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 23:58:49,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:49,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-30 23:58:49,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:58:49,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:58:49,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:58:49,687 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-30 23:58:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:49,739 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 23:58:49,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:58:49,739 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-30 23:58:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:49,740 INFO L225 Difference]: With dead ends: 16 [2018-09-30 23:58:49,740 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 23:58:49,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:58:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 23:58:49,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 23:58:49,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:58:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 23:58:49,745 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 23:58:49,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:49,745 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 23:58:49,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:58:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 23:58:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:58:49,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:49,746 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 23:58:49,746 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:49,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-30 23:58:49,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:49,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:49,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:49,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:50,003 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 23:58:50,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:50,004 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 23:58:50,012 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:50,022 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:50,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:50,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:50,038 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 23:58:50,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:50,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-09-30 23:58:50,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:58:50,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:58:50,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:58:50,067 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 23:58:50,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:50,101 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:58:50,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:58:50,102 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 23:58:50,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:50,103 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:58:50,103 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:58:50,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:58:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:58:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:58:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:58:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:58:50,108 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 23:58:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:50,108 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:58:50,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:58:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:58:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:58:50,109 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:50,109 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 23:58:50,109 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:50,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:50,110 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-30 23:58:50,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:50,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:50,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:50,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:50,274 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 23:58:50,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:50,275 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 23:58:50,289 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:50,304 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:58:50,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:50,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:50,328 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 23:58:50,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:50,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-30 23:58:50,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:58:50,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:58:50,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:58:50,352 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-30 23:58:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:50,416 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 23:58:50,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:58:50,418 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 23:58:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:50,419 INFO L225 Difference]: With dead ends: 18 [2018-09-30 23:58:50,419 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:58:50,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:58:50,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:58:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 23:58:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:58:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 23:58:50,423 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 23:58:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:50,423 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 23:58:50,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:58:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 23:58:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:58:50,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:50,424 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 23:58:50,425 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:50,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-30 23:58:50,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:50,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:50,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:50,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:50,740 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 23:58:50,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:50,740 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 23:58:50,748 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:50,765 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:58:50,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:50,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:50,783 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 23:58:50,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:50,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-09-30 23:58:50,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:58:50,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:58:50,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:58:50,807 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 23:58:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:50,913 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:58:50,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:58:50,914 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 23:58:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:50,916 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:58:50,916 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:58:50,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:58:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:58:50,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:58:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:58:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:58:50,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 23:58:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:50,922 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:58:50,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:58:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:58:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:58:50,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:50,923 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 23:58:50,923 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:50,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:50,923 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-30 23:58:50,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:50,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:50,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:50,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:51,197 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 23:58:51,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:51,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:51,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:51,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:51,238 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 23:58:51,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:51,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-30 23:58:51,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:58:51,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:58:51,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:58:51,271 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-30 23:58:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:51,567 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 23:58:51,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:58:51,568 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-30 23:58:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:51,569 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:58:51,569 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 23:58:51,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:58:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 23:58:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 23:58:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:58:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 23:58:51,576 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 23:58:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:51,577 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 23:58:51,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:58:51,577 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 23:58:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:51,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:51,578 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 23:58:51,578 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:51,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:51,578 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-30 23:58:51,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:51,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:51,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:51,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:51,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:51,876 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 23:58:51,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:51,876 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 23:58:51,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:51,897 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:51,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:51,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:51,915 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 23:58:51,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:51,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-09-30 23:58:51,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:58:51,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:58:51,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:58:51,946 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 23:58:52,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:52,047 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:58:52,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:58:52,049 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 23:58:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:52,049 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:58:52,050 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:58:52,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:58:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:58:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:58:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:58:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:58:52,054 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 23:58:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:52,054 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:58:52,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:58:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:58:52,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:58:52,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:52,055 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 23:58:52,055 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:52,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:52,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-30 23:58:52,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:52,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:52,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:52,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:52,301 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 23:58:52,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:52,302 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 23:58:52,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:52,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:58:52,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:52,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:52,536 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 23:58:52,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:52,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-30 23:58:52,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:58:52,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:58:52,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:58:52,581 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-30 23:58:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:52,844 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 23:58:52,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:58:52,845 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-30 23:58:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:52,845 INFO L225 Difference]: With dead ends: 22 [2018-09-30 23:58:52,845 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:58:52,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:58:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:58:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 23:58:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:58:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 23:58:52,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 23:58:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:52,850 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 23:58:52,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:58:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 23:58:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:52,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:52,851 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 23:58:52,851 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:52,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:52,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-30 23:58:52,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:52,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:52,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:52,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:53,201 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 23:58:53,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:53,202 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 23:58:53,209 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:53,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:53,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:53,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:53,256 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 23:58:53,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:53,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-09-30 23:58:53,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:58:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:58:53,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:58:53,286 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 23:58:53,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:53,345 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:58:53,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:58:53,345 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 23:58:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:53,346 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:58:53,346 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:58:53,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:58:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:58:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:58:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:58:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:58:53,352 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 23:58:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:53,353 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:58:53,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:58:53,353 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:58:53,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:58:53,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:53,354 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 23:58:53,354 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:53,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:53,355 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-30 23:58:53,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:53,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:53,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:53,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:53,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:53,789 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 23:58:53,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:53,789 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 23:58:53,804 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:53,895 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:58:53,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:53,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:53,984 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 23:58:54,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:54,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-30 23:58:54,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:58:54,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:58:54,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:58:54,015 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-30 23:58:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:54,098 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 23:58:54,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:58:54,100 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-30 23:58:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:54,101 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:58:54,101 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:58:54,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:58:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:58:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 23:58:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:58:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 23:58:54,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 23:58:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:54,104 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 23:58:54,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:58:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 23:58:54,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:58:54,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:54,105 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 23:58:54,106 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:54,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-30 23:58:54,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:54,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:54,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:54,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:54,468 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 23:58:54,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:54,469 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 23:58:54,478 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:54,494 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 23:58:54,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:54,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:54,511 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 23:58:54,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:54,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-09-30 23:58:54,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:58:54,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:58:54,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:58:54,542 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 23:58:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:54,627 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:58:54,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:58:54,627 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 23:58:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:54,628 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:58:54,628 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:58:54,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:58:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:58:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:58:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:58:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:58:54,634 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 23:58:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:54,634 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:58:54,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:58:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:58:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:58:54,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:54,635 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 23:58:54,636 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:54,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:54,636 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-30 23:58:54,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:54,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:54,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:54,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:55,071 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 23:58:55,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:55,071 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 23:58:55,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:55,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:55,110 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 23:58:55,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:55,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-30 23:58:55,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:58:55,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:58:55,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:58:55,141 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-30 23:58:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:55,195 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 23:58:55,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:58:55,196 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-30 23:58:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:55,197 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:58:55,197 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:58:55,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:58:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:58:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 23:58:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:58:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 23:58:55,202 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 23:58:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:55,202 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 23:58:55,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:58:55,202 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 23:58:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:58:55,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:55,203 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 23:58:55,203 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:55,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-30 23:58:55,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:55,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:55,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:55,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:55,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:55,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:55,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:58:55,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:55,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:55,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:55,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:55,581 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 23:58:55,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:55,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-09-30 23:58:55,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:58:55,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:58:55,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:58:55,613 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 23:58:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:55,713 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:58:55,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:58:55,714 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 23:58:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:55,715 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:58:55,715 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:58:55,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:58:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:58:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:58:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:58:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:58:55,719 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 23:58:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:55,720 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:58:55,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:58:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:58:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:58:55,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:55,721 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 23:58:55,721 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:55,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-30 23:58:55,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:55,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:55,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:55,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:55,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:56,075 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 23:58:56,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:56,076 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 23:58:56,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:56,104 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:58:56,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:56,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:56,131 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 23:58:56,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:56,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-30 23:58:56,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:58:56,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:58:56,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:58:56,155 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-30 23:58:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:56,228 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 23:58:56,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:58:56,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-30 23:58:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:56,232 INFO L225 Difference]: With dead ends: 28 [2018-09-30 23:58:56,232 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:58:56,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:58:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:58:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 23:58:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:58:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 23:58:56,236 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 23:58:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:56,236 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 23:58:56,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:58:56,237 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 23:58:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:58:56,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:56,237 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 23:58:56,238 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:56,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:56,238 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-30 23:58:56,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:56,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:56,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:56,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:56,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:56,769 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 23:58:56,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:56,769 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 23:58:56,777 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:56,796 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:56,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:56,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:56,816 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 23:58:56,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:56,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-09-30 23:58:56,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:58:56,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:58:56,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:58:56,847 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 23:58:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:56,936 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:58:56,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:58:56,936 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 23:58:56,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:56,937 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:58:56,937 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:58:56,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:58:56,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:58:56,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:58:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:58:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:58:56,942 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 23:58:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:56,943 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:58:56,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:58:56,943 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:58:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:58:56,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:56,944 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 23:58:56,944 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:56,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:56,944 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-30 23:58:56,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:56,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:56,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:56,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:56,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:57,454 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 23:58:57,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:57,455 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 23:58:57,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:57,637 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 23:58:57,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:57,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:57,681 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 23:58:57,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:57,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-30 23:58:57,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:58:57,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:58:57,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:58:57,711 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-30 23:58:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:57,778 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 23:58:57,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:58:57,778 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-30 23:58:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:57,779 INFO L225 Difference]: With dead ends: 30 [2018-09-30 23:58:57,779 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:58:57,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:58:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:58:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 23:58:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:58:57,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 23:58:57,784 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 23:58:57,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:57,784 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 23:58:57,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:58:57,785 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 23:58:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:58:57,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:57,785 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 23:58:57,786 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:57,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:57,786 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-30 23:58:57,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:57,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:57,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:57,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:57,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:58,648 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 23:58:58,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:58,648 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 23:58:58,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:58,676 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:58:58,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:58,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:58,692 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 23:58:58,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:58,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-09-30 23:58:58,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:58:58,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:58:58,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:58:58,723 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 23:58:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:58,783 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:58:58,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:58:58,784 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 23:58:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:58,784 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:58:58,784 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:58:58,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:58:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:58:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:58:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:58:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:58:58,789 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 23:58:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:58,789 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:58:58,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:58:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:58:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:58:58,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:58,790 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 23:58:58,791 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:58,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:58,791 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-30 23:58:58,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:58,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:58,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:58,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:58,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:00,169 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 23:59:00,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:00,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:00,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:00,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:00,218 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 23:59:00,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:00,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-30 23:59:00,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:59:00,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:59:00,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:59:00,249 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-30 23:59:00,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:00,403 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 23:59:00,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:59:00,403 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-30 23:59:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:00,404 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:59:00,404 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:59:00,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:59:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:59:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 23:59:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:59:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 23:59:00,408 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 23:59:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:00,408 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 23:59:00,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:59:00,408 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 23:59:00,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:59:00,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:00,409 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 23:59:00,409 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:00,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:00,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-30 23:59:00,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:00,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:00,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:00,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:00,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:01,434 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 23:59:01,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:01,434 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 23:59:01,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:01,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:01,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:01,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:01,500 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 23:59:01,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:01,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-09-30 23:59:01,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:59:01,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:59:01,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:59:01,533 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 23:59:01,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:01,652 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:59:01,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:59:01,652 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 23:59:01,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:01,652 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:59:01,653 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:59:01,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:59:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:59:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:59:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:59:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:59:01,656 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 23:59:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:01,656 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:59:01,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:59:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:59:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:59:01,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:01,657 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 23:59:01,657 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:01,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-30 23:59:01,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:01,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:01,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:01,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:01,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:02,085 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 23:59:02,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:02,085 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 23:59:02,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:02,113 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 23:59:02,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:02,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:02,128 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 23:59:02,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:02,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-30 23:59:02,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:59:02,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:59:02,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:59:02,150 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-30 23:59:02,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:02,227 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 23:59:02,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:59:02,228 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-30 23:59:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:02,229 INFO L225 Difference]: With dead ends: 34 [2018-09-30 23:59:02,229 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:59:02,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:59:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:59:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 23:59:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 23:59:02,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 23:59:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:02,234 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 23:59:02,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:59:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 23:59:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 23:59:02,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:02,235 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 23:59:02,235 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:02,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:02,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-30 23:59:02,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:02,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:02,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:02,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:02,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:02,718 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 23:59:02,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:02,718 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 23:59:02,732 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:02,754 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:02,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:02,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:02,779 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 23:59:02,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:02,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-09-30 23:59:02,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:59:02,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:59:02,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:59:02,810 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 23:59:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:03,057 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:59:03,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:59:03,057 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 23:59:03,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:03,057 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:59:03,058 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:59:03,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:59:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:59:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:59:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:59:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:59:03,062 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 23:59:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:03,062 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:59:03,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:59:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:59:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:59:03,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:03,063 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 23:59:03,064 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:03,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:03,064 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-30 23:59:03,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:03,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:03,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:03,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:03,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:03,726 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 23:59:03,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:03,727 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 23:59:03,735 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:03,764 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 23:59:03,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:03,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:03,794 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 23:59:03,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:03,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-30 23:59:03,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:59:03,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:59:03,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:59:03,818 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-30 23:59:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:03,916 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 23:59:03,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:59:03,917 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-30 23:59:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:03,917 INFO L225 Difference]: With dead ends: 36 [2018-09-30 23:59:03,918 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:59:03,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:59:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:59:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 23:59:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 23:59:03,923 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 23:59:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:03,924 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 23:59:03,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:59:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 23:59:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:59:03,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:03,924 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 23:59:03,925 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:03,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-09-30 23:59:03,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:03,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:03,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:03,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:03,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:04,485 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 23:59:04,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:04,485 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 23:59:04,499 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:04,521 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 23:59:04,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:04,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:04,569 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 23:59:04,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:04,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-09-30 23:59:04,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:59:04,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:59:04,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:59:04,601 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 23:59:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:04,691 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:59:04,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:59:04,691 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 23:59:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:04,692 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:59:04,692 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:59:04,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:59:04,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:59:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:59:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:59:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:59:04,696 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 23:59:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:04,697 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:59:04,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:59:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:59:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:59:04,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:04,697 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 23:59:04,698 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:04,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:04,698 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-09-30 23:59:04,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:04,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:04,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:04,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:04,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:05,394 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 23:59:05,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:05,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:05,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:05,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:05,450 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 23:59:05,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:05,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-30 23:59:05,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:59:05,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:59:05,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:59:05,473 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-30 23:59:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:05,528 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 23:59:05,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:59:05,529 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-30 23:59:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:05,530 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:59:05,530 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:59:05,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:59:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:59:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 23:59:05,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 23:59:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 23:59:05,534 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 23:59:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:05,535 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 23:59:05,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:59:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 23:59:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 23:59:05,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:05,535 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 23:59:05,536 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:05,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:05,536 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-09-30 23:59:05,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:05,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:05,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:05,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:05,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:06,072 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 23:59:06,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:06,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:06,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:06,102 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:06,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:06,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:06,118 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 23:59:06,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:06,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-09-30 23:59:06,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:59:06,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:59:06,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:59:06,139 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 23:59:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:06,214 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:59:06,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:59:06,215 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 23:59:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:06,216 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:59:06,216 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:59:06,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:59:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:59:06,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:59:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:59:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:59:06,221 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 23:59:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:06,221 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:59:06,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:59:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:59:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:59:06,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:06,222 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 23:59:06,222 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:06,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-09-30 23:59:06,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:06,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:06,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:06,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:06,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:07,112 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 23:59:07,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:07,112 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 23:59:07,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:07,154 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 23:59:07,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:07,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:07,171 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 23:59:07,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:07,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-30 23:59:07,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:59:07,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:59:07,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:59:07,193 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-30 23:59:07,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:07,257 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 23:59:07,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:59:07,257 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-30 23:59:07,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:07,258 INFO L225 Difference]: With dead ends: 40 [2018-09-30 23:59:07,258 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 23:59:07,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:59:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 23:59:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 23:59:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 23:59:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 23:59:07,262 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 23:59:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:07,262 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 23:59:07,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:59:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 23:59:07,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:59:07,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:07,263 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 23:59:07,263 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:07,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:07,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-09-30 23:59:07,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:07,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:07,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:07,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:07,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:08,009 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 23:59:08,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:08,010 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 23:59:08,017 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:08,042 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:08,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:08,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:08,062 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 23:59:08,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:08,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-09-30 23:59:08,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:59:08,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:59:08,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:59:08,095 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 23:59:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:08,732 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:59:08,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:59:08,733 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 23:59:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:08,733 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:59:08,734 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:59:08,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:59:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:59:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:59:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:59:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:59:08,738 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 23:59:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:08,739 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:59:08,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:59:08,739 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:59:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:59:08,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:08,740 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 23:59:08,740 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:08,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:08,740 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-09-30 23:59:08,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:08,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:08,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:08,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:08,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:09,683 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 23:59:09,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:09,684 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 23:59:09,691 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:09,719 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:59:09,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:09,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:09,735 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 23:59:09,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:09,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-30 23:59:09,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:59:09,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:59:09,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:59:09,757 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-30 23:59:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:09,828 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 23:59:09,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:59:09,828 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-30 23:59:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:09,829 INFO L225 Difference]: With dead ends: 42 [2018-09-30 23:59:09,829 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:59:09,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:59:09,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:59:09,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 23:59:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:59:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 23:59:09,833 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 23:59:09,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:09,833 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 23:59:09,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:59:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 23:59:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 23:59:09,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:09,833 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 23:59:09,834 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:09,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:09,834 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-09-30 23:59:09,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:09,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:09,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:09,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:09,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:10,487 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 23:59:10,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:10,487 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 23:59:10,496 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:10,526 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:59:10,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:10,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:10,546 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 23:59:10,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:10,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-09-30 23:59:10,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:59:10,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:59:10,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:59:10,567 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 23:59:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:10,617 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:59:10,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:59:10,617 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 23:59:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:10,618 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:59:10,618 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:59:10,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:59:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:59:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:59:10,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:59:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:59:10,622 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 23:59:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:10,622 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:59:10,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:59:10,622 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:59:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:59:10,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:10,623 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 23:59:10,623 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:10,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:10,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-09-30 23:59:10,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:10,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:10,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:10,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:10,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:11,294 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 23:59:11,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:11,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:11,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:11,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:11,369 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 23:59:11,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:11,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-30 23:59:11,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:59:11,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:59:11,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:59:11,391 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-30 23:59:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:11,467 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 23:59:11,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:59:11,467 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-30 23:59:11,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:11,468 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:59:11,468 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 23:59:11,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:59:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 23:59:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 23:59:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 23:59:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 23:59:11,471 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 23:59:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:11,471 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 23:59:11,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:59:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 23:59:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:59:11,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:11,472 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 23:59:11,472 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:11,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-09-30 23:59:11,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:11,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:11,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:11,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:12,488 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 23:59:12,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:12,488 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 23:59:12,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:12,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:12,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:12,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:12,550 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 23:59:12,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:12,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-09-30 23:59:12,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:59:12,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:59:12,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:59:12,582 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 23:59:12,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:12,736 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:59:12,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:59:12,736 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 23:59:12,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:12,737 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:59:12,737 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:59:12,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:59:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:59:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:59:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:59:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:59:12,740 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 23:59:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:12,741 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:59:12,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:59:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:59:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:59:12,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:12,741 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 23:59:12,741 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:12,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:12,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-09-30 23:59:12,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:12,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:12,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:12,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:12,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:13,729 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 23:59:13,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:13,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:13,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:13,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 23:59:13,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:13,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:13,800 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 23:59:13,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:13,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-30 23:59:13,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:59:13,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:59:13,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:59:13,823 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-30 23:59:13,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:13,891 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 23:59:13,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:59:13,892 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-30 23:59:13,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:13,893 INFO L225 Difference]: With dead ends: 46 [2018-09-30 23:59:13,893 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 23:59:13,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:59:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 23:59:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 23:59:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 23:59:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 23:59:13,898 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 23:59:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:13,898 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 23:59:13,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:59:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 23:59:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 23:59:13,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:13,899 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 23:59:13,899 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:13,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:13,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-09-30 23:59:13,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:13,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:13,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:13,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:13,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:14,731 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 23:59:14,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:14,732 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 23:59:14,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:14,778 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:14,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:14,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:14,798 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 23:59:14,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:14,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-09-30 23:59:14,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:59:14,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:59:14,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:59:14,821 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 23:59:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:14,927 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:59:14,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:59:14,928 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 23:59:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:14,929 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:59:14,929 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:59:14,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:59:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:59:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:59:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:59:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:59:14,932 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 23:59:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:14,933 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:59:14,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:59:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:59:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:59:14,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:14,933 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 23:59:14,933 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:14,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-09-30 23:59:14,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:14,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:14,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:14,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:14,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:15,893 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 23:59:15,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:15,894 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 23:59:15,901 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:15,940 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 23:59:15,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:15,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:15,959 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 23:59:15,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:15,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-30 23:59:15,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:59:15,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:59:15,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:59:15,982 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-30 23:59:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:16,060 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 23:59:16,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:59:16,061 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-30 23:59:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:16,062 INFO L225 Difference]: With dead ends: 48 [2018-09-30 23:59:16,062 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:59:16,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:59:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:59:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 23:59:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 23:59:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 23:59:16,066 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 23:59:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:16,066 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 23:59:16,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:59:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 23:59:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 23:59:16,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:16,067 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 23:59:16,067 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:16,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:16,067 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-09-30 23:59:16,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:16,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:16,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:16,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:17,142 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 23:59:17,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:17,143 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 23:59:17,151 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:17,187 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 23:59:17,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:17,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:17,208 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 23:59:17,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:17,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-09-30 23:59:17,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:59:17,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:59:17,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:59:17,231 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 23:59:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:17,299 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:59:17,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:59:17,300 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 23:59:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:17,301 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:59:17,301 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:59:17,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:59:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:59:17,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:59:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:59:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:59:17,304 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 23:59:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:17,305 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:59:17,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:59:17,305 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:59:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:59:17,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:17,305 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 23:59:17,305 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:17,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:17,306 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-09-30 23:59:17,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:17,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:17,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:17,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:17,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:18,252 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 23:59:18,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:18,253 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 23:59:18,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:18,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:18,311 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 23:59:18,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:18,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-30 23:59:18,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:59:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:59:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:59:18,333 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-30 23:59:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:18,479 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 23:59:18,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:59:18,479 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-30 23:59:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:18,480 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:59:18,480 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 23:59:18,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:59:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 23:59:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 23:59:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 23:59:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 23:59:18,485 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 23:59:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:18,485 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 23:59:18,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:59:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 23:59:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:59:18,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:18,486 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 23:59:18,486 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:18,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:18,487 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-09-30 23:59:18,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:18,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:18,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:18,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:18,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:19,724 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 23:59:19,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:19,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:19,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:19,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:19,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:19,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:19,775 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 23:59:19,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:19,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-09-30 23:59:19,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:59:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:59:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:59:19,801 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 23:59:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:19,891 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:59:19,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:59:19,892 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 23:59:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:19,893 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:59:19,893 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:59:19,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:59:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:59:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:59:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:59:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:59:19,896 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 23:59:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:19,896 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:59:19,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:59:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:59:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:59:19,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:19,897 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 23:59:19,897 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:19,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:19,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-09-30 23:59:19,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:19,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:19,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:19,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:20,999 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 23:59:20,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:20,999 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 23:59:21,007 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:21,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 23:59:21,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:21,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:21,079 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 23:59:21,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:21,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-30 23:59:21,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:59:21,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:59:21,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:59:21,101 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-30 23:59:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:21,510 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 23:59:21,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:59:21,511 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-30 23:59:21,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:21,512 INFO L225 Difference]: With dead ends: 52 [2018-09-30 23:59:21,512 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:59:21,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:59:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:59:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 23:59:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 23:59:21,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 23:59:21,515 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 23:59:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:21,515 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 23:59:21,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:59:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 23:59:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:59:21,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:21,515 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 23:59:21,516 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:21,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-09-30 23:59:21,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:21,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:21,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:21,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:21,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:22,814 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 23:59:22,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:22,814 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 23:59:22,822 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:22,853 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:22,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:22,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:22,913 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 23:59:22,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:22,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-09-30 23:59:22,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:59:22,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:59:22,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:59:22,940 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 23:59:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:23,042 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:59:23,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:59:23,043 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 23:59:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:23,044 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:59:23,044 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:59:23,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:59:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:59:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:59:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:59:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:59:23,047 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 23:59:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:23,047 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:59:23,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:59:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:59:23,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:59:23,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:23,048 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 23:59:23,048 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:23,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:23,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-09-30 23:59:23,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:23,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:23,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:23,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:24,310 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 23:59:24,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:24,311 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 23:59:24,318 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:24,359 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 23:59:24,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:24,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:24,387 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 23:59:24,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:24,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-30 23:59:24,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:59:24,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:59:24,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:59:24,408 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-30 23:59:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:24,496 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 23:59:24,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:59:24,499 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-30 23:59:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:24,500 INFO L225 Difference]: With dead ends: 54 [2018-09-30 23:59:24,500 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 23:59:24,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:59:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 23:59:24,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 23:59:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 23:59:24,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 23:59:24,506 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 23:59:24,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:24,507 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 23:59:24,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:59:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 23:59:24,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 23:59:24,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:24,508 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 23:59:24,508 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:24,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:24,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-09-30 23:59:24,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:24,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:24,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:24,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:24,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:25,653 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 23:59:25,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:25,654 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 23:59:25,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:25,699 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:59:25,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:25,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:25,721 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 23:59:25,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:25,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-09-30 23:59:25,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:59:25,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:59:25,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:59:25,742 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 23:59:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:25,826 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:59:25,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:59:25,826 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 23:59:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:25,827 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:59:25,827 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:59:25,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:59:25,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:59:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:59:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:59:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:59:25,831 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 23:59:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:25,831 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:59:25,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:59:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:59:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:59:25,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:25,832 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 23:59:25,832 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:25,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:25,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-09-30 23:59:25,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:25,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:25,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:25,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:28,104 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 23:59:28,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:28,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:28,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:28,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:28,160 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 23:59:28,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:28,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-30 23:59:28,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:59:28,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:59:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:59:28,187 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-30 23:59:28,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:28,286 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 23:59:28,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:59:28,287 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-30 23:59:28,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:28,288 INFO L225 Difference]: With dead ends: 56 [2018-09-30 23:59:28,288 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 23:59:28,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:59:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 23:59:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 23:59:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 23:59:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 23:59:28,292 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 23:59:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:28,292 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 23:59:28,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:59:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 23:59:28,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:59:28,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:28,293 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 23:59:28,293 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:28,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:28,294 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-09-30 23:59:28,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:28,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:28,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:28,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:28,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:29,506 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 23:59:29,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:29,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:29,516 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:29,570 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:29,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:29,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:29,684 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 23:59:29,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:29,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2018-09-30 23:59:29,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:59:29,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:59:29,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:59:29,717 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 23:59:29,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:29,994 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:59:29,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:59:29,994 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 23:59:29,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:29,996 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:59:29,996 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:59:29,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:59:29,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:59:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:59:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:59:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:59:29,999 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 23:59:29,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:29,999 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:59:29,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:59:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:59:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:59:30,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:30,000 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 23:59:30,000 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:30,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:30,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-09-30 23:59:30,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:30,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:30,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:30,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:30,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:31,302 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 23:59:31,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:31,302 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 23:59:31,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:31,352 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 23:59:31,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:31,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:31,373 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 23:59:31,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:31,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-30 23:59:31,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:59:31,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:59:31,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:59:31,408 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-30 23:59:31,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:31,666 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 23:59:31,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:59:31,667 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-30 23:59:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:31,668 INFO L225 Difference]: With dead ends: 58 [2018-09-30 23:59:31,668 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 23:59:31,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:59:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 23:59:31,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 23:59:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:59:31,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 23:59:31,672 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 23:59:31,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:31,672 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 23:59:31,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:59:31,672 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 23:59:31,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 23:59:31,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:31,673 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 23:59:31,673 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:31,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:31,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-09-30 23:59:31,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:31,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:31,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:31,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:31,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:33,185 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 23:59:33,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:33,185 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 23:59:33,193 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:33,227 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:33,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:33,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:33,250 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 23:59:33,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:33,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2018-09-30 23:59:33,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:59:33,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:59:33,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:59:33,273 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 23:59:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:33,383 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 23:59:33,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:59:33,384 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 23:59:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:33,385 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:59:33,385 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:59:33,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:59:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:59:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:59:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:59:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 23:59:33,389 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 23:59:33,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:33,389 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 23:59:33,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:59:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 23:59:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:59:33,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:33,390 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 23:59:33,390 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:33,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:33,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-09-30 23:59:33,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:33,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:33,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:33,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:33,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:34,646 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 23:59:34,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:34,646 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 23:59:34,653 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:34,698 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 23:59:34,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:34,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:34,720 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 23:59:34,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:34,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-30 23:59:34,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:59:34,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:59:34,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:59:34,741 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-30 23:59:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:34,881 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 23:59:34,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:59:34,882 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-30 23:59:34,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:34,883 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:59:34,883 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 23:59:34,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:59:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 23:59:34,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 23:59:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 23:59:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 23:59:34,886 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 23:59:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:34,886 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 23:59:34,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:59:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 23:59:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 23:59:34,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:34,887 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 23:59:34,887 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:34,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:34,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-09-30 23:59:34,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:34,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:34,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:34,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:34,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:36,188 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 23:59:36,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:36,188 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 23:59:36,195 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:36,237 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 23:59:36,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:36,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:36,259 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 23:59:36,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:36,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2018-09-30 23:59:36,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:59:36,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:59:36,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:59:36,293 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 23:59:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:36,454 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:59:36,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:59:36,454 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 23:59:36,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:36,455 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:59:36,455 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:59:36,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:59:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:59:36,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:59:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:59:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:59:36,458 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 23:59:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:36,458 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:59:36,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:59:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:59:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:59:36,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:36,459 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 23:59:36,460 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:36,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:36,460 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-09-30 23:59:36,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:36,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:36,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:36,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:36,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:38,070 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 23:59:38,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:38,070 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 23:59:38,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:38,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:38,165 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 23:59:38,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:38,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-30 23:59:38,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:59:38,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:59:38,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:59:38,187 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-30 23:59:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:38,302 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 23:59:38,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:59:38,302 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-30 23:59:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:38,303 INFO L225 Difference]: With dead ends: 62 [2018-09-30 23:59:38,303 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 23:59:38,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:59:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 23:59:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 23:59:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 23:59:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 23:59:38,307 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 23:59:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:38,308 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 23:59:38,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:59:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 23:59:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 23:59:38,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:38,308 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 23:59:38,309 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:38,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-09-30 23:59:38,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:38,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:38,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:38,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:38,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:39,752 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 23:59:39,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:39,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:39,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:39,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:39,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:39,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:39,822 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 23:59:39,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:39,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2018-09-30 23:59:39,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:59:39,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:59:39,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:59:39,844 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 23:59:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:39,945 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 23:59:39,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:59:39,945 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 23:59:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:39,946 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:59:39,946 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:59:39,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:59:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:59:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:59:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:59:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 23:59:39,951 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 23:59:39,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:39,951 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 23:59:39,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:59:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 23:59:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:59:39,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:39,952 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 23:59:39,953 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:39,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:39,953 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-09-30 23:59:39,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:39,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:39,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:39,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:39,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:41,521 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 23:59:41,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:41,522 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 23:59:41,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:41,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 23:59:41,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:41,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:41,599 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 23:59:41,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:41,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-30 23:59:41,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:59:41,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:59:41,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:59:41,630 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-30 23:59:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:41,781 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 23:59:41,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:59:41,782 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-30 23:59:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:41,782 INFO L225 Difference]: With dead ends: 64 [2018-09-30 23:59:41,783 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 23:59:41,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:59:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 23:59:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 23:59:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 23:59:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 23:59:41,787 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 23:59:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:41,787 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 23:59:41,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:59:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 23:59:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 23:59:41,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:41,788 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 23:59:41,788 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:41,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:41,788 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-09-30 23:59:41,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:41,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:41,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:41,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:41,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:43,515 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 23:59:43,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:43,515 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 23:59:43,524 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:43,562 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:43,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:43,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:43,605 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 23:59:43,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:43,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2018-09-30 23:59:43,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:59:43,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:59:43,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:59:43,626 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 23:59:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:43,737 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:59:43,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:59:43,738 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 23:59:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:43,739 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:59:43,739 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:59:43,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:59:43,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:59:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:59:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:59:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:59:43,743 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 23:59:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:43,743 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:59:43,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:59:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:59:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:59:43,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:43,744 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 23:59:43,744 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:43,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:43,745 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-09-30 23:59:43,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:43,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:43,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:43,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:43,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:46,038 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 23:59:46,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:46,038 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 23:59:46,046 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:46,097 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 23:59:46,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:46,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:46,127 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 23:59:46,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:46,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-30 23:59:46,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:59:46,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:59:46,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:59:46,157 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-30 23:59:46,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:46,304 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 23:59:46,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:59:46,305 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-30 23:59:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:46,306 INFO L225 Difference]: With dead ends: 66 [2018-09-30 23:59:46,306 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 23:59:46,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:59:46,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 23:59:46,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 23:59:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 23:59:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 23:59:46,309 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 23:59:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:46,309 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 23:59:46,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:59:46,309 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 23:59:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 23:59:46,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:46,310 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 23:59:46,310 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:46,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-09-30 23:59:46,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:46,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:46,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:46,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:46,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:50,197 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 23:59:50,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:50,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:50,205 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:50,254 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:59:50,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:50,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:50,283 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 23:59:50,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:50,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2018-09-30 23:59:50,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:59:50,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:59:50,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:59:50,314 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 23:59:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:50,423 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 23:59:50,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:59:50,424 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 23:59:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:50,425 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:59:50,425 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:59:50,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:59:50,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:59:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:59:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:59:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 23:59:50,428 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 23:59:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:50,429 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 23:59:50,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:59:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 23:59:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:59:50,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:50,430 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 23:59:50,430 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:50,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-09-30 23:59:50,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:50,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:50,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:50,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:50,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:52,130 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 23:59:52,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:52,130 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 23:59:52,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:52,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:52,200 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 23:59:52,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:52,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-30 23:59:52,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:59:52,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:59:52,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:59:52,221 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-30 23:59:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:52,320 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 23:59:52,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:59:52,320 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-30 23:59:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:52,321 INFO L225 Difference]: With dead ends: 68 [2018-09-30 23:59:52,321 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 23:59:52,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:59:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 23:59:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 23:59:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 23:59:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 23:59:52,325 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 23:59:52,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:52,326 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 23:59:52,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:59:52,326 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 23:59:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 23:59:52,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:52,326 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 23:59:52,327 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:52,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:52,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-09-30 23:59:52,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:52,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:52,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:52,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:52,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:55,226 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 23:59:55,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:55,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:59:55,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:55,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:55,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:55,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:55,299 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 23:59:55,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:55,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2018-09-30 23:59:55,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:59:55,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:59:55,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:59:55,330 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 23:59:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:55,547 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:59:55,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:59:55,548 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 23:59:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:55,549 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:59:55,549 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:59:55,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:59:55,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:59:55,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:59:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:59:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:59:55,553 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 23:59:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:55,553 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:59:55,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:59:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:59:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:59:55,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:55,554 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 23:59:55,554 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:55,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-09-30 23:59:55,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:55,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:55,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:55,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:55,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:58,346 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 23:59:58,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:58,347 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 23:59:58,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:58,481 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 23:59:58,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:58,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:58,505 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 23:59:58,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:58,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-30 23:59:58,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:59:58,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:59:58,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:59:58,527 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-30 23:59:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:58,652 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 23:59:58,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:59:58,659 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-30 23:59:58,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:58,659 INFO L225 Difference]: With dead ends: 70 [2018-09-30 23:59:58,660 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 23:59:58,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:59:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 23:59:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 23:59:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 23:59:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 23:59:58,663 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 23:59:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:58,663 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 23:59:58,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:59:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 23:59:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 23:59:58,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:58,664 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 23:59:58,664 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:58,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-09-30 23:59:58,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:58,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:58,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:58,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:58,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:00,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:00,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:00,787 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:00,839 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:00,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:00,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:00,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:00,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2018-10-01 00:00:00,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-01 00:00:00,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-01 00:00:00,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-01 00:00:00,909 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-10-01 00:00:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:01,083 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-01 00:00:01,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-01 00:00:01,083 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-10-01 00:00:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:01,084 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:00:01,084 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:00:01,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-01 00:00:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:00:01,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-01 00:00:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-01 00:00:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-01 00:00:01,088 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-01 00:00:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:01,088 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-01 00:00:01,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-01 00:00:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-01 00:00:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-01 00:00:01,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:01,089 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-01 00:00:01,089 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:01,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-10-01 00:00:01,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:01,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:01,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:01,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:01,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:03,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:03,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:03,275 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:03,332 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-01 00:00:03,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:03,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:03,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:03,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-10-01 00:00:03,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-01 00:00:03,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-01 00:00:03,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:00:03,377 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-10-01 00:00:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:03,508 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-01 00:00:03,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-01 00:00:03,508 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-10-01 00:00:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:03,509 INFO L225 Difference]: With dead ends: 72 [2018-10-01 00:00:03,509 INFO L226 Difference]: Without dead ends: 70 [2018-10-01 00:00:03,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:00:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-01 00:00:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-01 00:00:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-01 00:00:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-01 00:00:03,513 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-01 00:00:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:03,513 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-01 00:00:03,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-01 00:00:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-01 00:00:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-01 00:00:03,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:03,513 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-01 00:00:03,514 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:03,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:03,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-10-01 00:00:03,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:03,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:03,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:03,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:03,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:05,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:05,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:05,466 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:05,521 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-01 00:00:05,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:05,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:05,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:05,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2018-10-01 00:00:05,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-01 00:00:05,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-01 00:00:05,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-01 00:00:05,664 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-10-01 00:00:05,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:05,955 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-01 00:00:05,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-01 00:00:05,955 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-10-01 00:00:05,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:05,956 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:00:05,957 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:00:05,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-01 00:00:05,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:00:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-01 00:00:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-01 00:00:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-01 00:00:05,961 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-01 00:00:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:05,961 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-01 00:00:05,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-01 00:00:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-01 00:00:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-01 00:00:05,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:05,962 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-01 00:00:05,962 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:05,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:05,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-10-01 00:00:05,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:05,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:05,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:05,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:05,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:07,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:07,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:07,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:07,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-10-01 00:00:07,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-01 00:00:07,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-01 00:00:07,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:00:07,987 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-10-01 00:00:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:08,204 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-01 00:00:08,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-01 00:00:08,204 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-10-01 00:00:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:08,205 INFO L225 Difference]: With dead ends: 74 [2018-10-01 00:00:08,205 INFO L226 Difference]: Without dead ends: 72 [2018-10-01 00:00:08,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:00:08,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-01 00:00:08,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-01 00:00:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-01 00:00:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-01 00:00:08,207 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-01 00:00:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:08,208 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-01 00:00:08,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-01 00:00:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-01 00:00:08,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-01 00:00:08,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:08,208 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-01 00:00:08,209 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:08,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:08,209 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-10-01 00:00:08,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:08,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:08,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:08,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:08,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:10,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:10,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:10,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:10,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:10,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:10,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:10,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:10,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2018-10-01 00:00:10,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-01 00:00:10,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-01 00:00:10,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:00:10,328 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-10-01 00:00:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:10,496 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-01 00:00:10,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-01 00:00:10,496 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-10-01 00:00:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:10,497 INFO L225 Difference]: With dead ends: 75 [2018-10-01 00:00:10,497 INFO L226 Difference]: Without dead ends: 73 [2018-10-01 00:00:10,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:00:10,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-01 00:00:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-01 00:00:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-01 00:00:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-01 00:00:10,501 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-01 00:00:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:10,501 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-01 00:00:10,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-01 00:00:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-01 00:00:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-01 00:00:10,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:10,502 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-01 00:00:10,502 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:10,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:10,502 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-10-01 00:00:10,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:10,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:10,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:10,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:10,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:12,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:12,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:12,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:12,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-01 00:00:12,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:12,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:12,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:12,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-10-01 00:00:12,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-01 00:00:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-01 00:00:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:00:12,900 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-10-01 00:00:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:13,702 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-01 00:00:13,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-01 00:00:13,702 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-10-01 00:00:13,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:13,703 INFO L225 Difference]: With dead ends: 76 [2018-10-01 00:00:13,703 INFO L226 Difference]: Without dead ends: 74 [2018-10-01 00:00:13,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:00:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-01 00:00:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-01 00:00:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-01 00:00:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-01 00:00:13,708 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-01 00:00:13,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:13,708 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-01 00:00:13,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-01 00:00:13,708 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-01 00:00:13,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-01 00:00:13,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:13,709 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-01 00:00:13,709 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:13,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:13,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-10-01 00:00:13,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:13,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:13,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:13,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:13,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:15,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:15,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:15,818 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:15,858 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:15,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:15,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:15,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:15,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2018-10-01 00:00:15,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-01 00:00:15,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-01 00:00:15,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:00:15,914 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-10-01 00:00:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:16,083 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-01 00:00:16,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-01 00:00:16,084 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-10-01 00:00:16,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:16,084 INFO L225 Difference]: With dead ends: 77 [2018-10-01 00:00:16,084 INFO L226 Difference]: Without dead ends: 75 [2018-10-01 00:00:16,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:00:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-01 00:00:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-01 00:00:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-01 00:00:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-01 00:00:16,088 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-01 00:00:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:16,088 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-01 00:00:16,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-01 00:00:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-01 00:00:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-01 00:00:16,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:16,089 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-01 00:00:16,089 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:16,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-10-01 00:00:16,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:16,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:16,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:16,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:16,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:18,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:18,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:18,932 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:18,994 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-01 00:00:18,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:18,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:19,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:19,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-10-01 00:00:19,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-01 00:00:19,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-01 00:00:19,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:00:19,054 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-10-01 00:00:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:19,180 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-01 00:00:19,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-01 00:00:19,180 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-10-01 00:00:19,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:19,181 INFO L225 Difference]: With dead ends: 78 [2018-10-01 00:00:19,182 INFO L226 Difference]: Without dead ends: 76 [2018-10-01 00:00:19,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:00:19,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-01 00:00:19,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-01 00:00:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-01 00:00:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-01 00:00:19,186 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-01 00:00:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:19,186 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-01 00:00:19,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-01 00:00:19,187 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-01 00:00:19,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-01 00:00:19,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:19,187 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-01 00:00:19,188 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:19,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:19,188 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-10-01 00:00:19,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:19,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:19,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:19,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:19,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:21,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:21,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:21,560 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:21,659 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-01 00:00:21,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:21,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:21,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:21,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2018-10-01 00:00:21,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-01 00:00:21,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-01 00:00:21,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:00:21,733 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-10-01 00:00:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:21,903 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-01 00:00:21,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-01 00:00:21,903 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-10-01 00:00:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:21,904 INFO L225 Difference]: With dead ends: 79 [2018-10-01 00:00:21,904 INFO L226 Difference]: Without dead ends: 77 [2018-10-01 00:00:21,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:00:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-01 00:00:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-01 00:00:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-01 00:00:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-01 00:00:21,907 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-01 00:00:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:21,907 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-01 00:00:21,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-01 00:00:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-01 00:00:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-01 00:00:21,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:21,908 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-01 00:00:21,908 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:21,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:21,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-10-01 00:00:21,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:21,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:21,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:21,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:21,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:24,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:24,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:24,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:24,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:24,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:24,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-10-01 00:00:24,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 00:00:24,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 00:00:24,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:00:24,499 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-10-01 00:00:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:24,660 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-01 00:00:24,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-01 00:00:24,661 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-10-01 00:00:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:24,662 INFO L225 Difference]: With dead ends: 80 [2018-10-01 00:00:24,662 INFO L226 Difference]: Without dead ends: 78 [2018-10-01 00:00:24,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:00:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-01 00:00:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-01 00:00:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-01 00:00:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-01 00:00:24,665 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-01 00:00:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:24,665 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-01 00:00:24,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-01 00:00:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-01 00:00:24,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-01 00:00:24,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:24,666 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-01 00:00:24,666 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:24,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:24,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-10-01 00:00:24,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:24,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:24,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:24,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:24,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:26,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:26,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:26,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:27,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:27,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:27,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:27,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:27,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2018-10-01 00:00:27,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-01 00:00:27,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-01 00:00:27,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:00:27,072 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-10-01 00:00:27,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:27,222 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-01 00:00:27,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-01 00:00:27,223 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-10-01 00:00:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:27,224 INFO L225 Difference]: With dead ends: 81 [2018-10-01 00:00:27,224 INFO L226 Difference]: Without dead ends: 79 [2018-10-01 00:00:27,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:00:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-01 00:00:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-01 00:00:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-01 00:00:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-01 00:00:27,228 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-01 00:00:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:27,228 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-01 00:00:27,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-01 00:00:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-01 00:00:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-01 00:00:27,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:27,229 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-01 00:00:27,229 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:27,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-10-01 00:00:27,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:27,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:27,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:27,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:27,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:29,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:29,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:29,929 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:29,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-01 00:00:29,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:29,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:30,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:30,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-10-01 00:00:30,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-01 00:00:30,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-01 00:00:30,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:00:30,122 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-10-01 00:00:30,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:30,240 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-01 00:00:30,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-01 00:00:30,240 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-10-01 00:00:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:30,241 INFO L225 Difference]: With dead ends: 82 [2018-10-01 00:00:30,241 INFO L226 Difference]: Without dead ends: 80 [2018-10-01 00:00:30,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:00:30,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-01 00:00:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-01 00:00:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-01 00:00:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-01 00:00:30,246 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-01 00:00:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:30,246 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-01 00:00:30,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-01 00:00:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-01 00:00:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-01 00:00:30,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:30,247 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-01 00:00:30,247 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:30,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:30,247 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-10-01 00:00:30,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:30,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:30,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:30,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:30,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:32,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:32,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:32,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:32,685 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:32,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:32,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:32,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:32,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2018-10-01 00:00:32,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-01 00:00:32,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-01 00:00:32,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:00:32,732 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-10-01 00:00:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:33,626 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-01 00:00:33,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-01 00:00:33,627 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-10-01 00:00:33,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:33,628 INFO L225 Difference]: With dead ends: 83 [2018-10-01 00:00:33,628 INFO L226 Difference]: Without dead ends: 81 [2018-10-01 00:00:33,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:00:33,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-01 00:00:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-01 00:00:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-01 00:00:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-01 00:00:33,630 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-01 00:00:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:33,630 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-01 00:00:33,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-01 00:00:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-01 00:00:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-01 00:00:33,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:33,631 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-01 00:00:33,631 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:33,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:33,632 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-10-01 00:00:33,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:33,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:33,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:33,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:33,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:36,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:36,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:36,291 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:36,358 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-01 00:00:36,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:36,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:36,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:36,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2018-10-01 00:00:36,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-01 00:00:36,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-01 00:00:36,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:00:36,404 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-10-01 00:00:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:36,520 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-01 00:00:36,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-01 00:00:36,521 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-10-01 00:00:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:36,521 INFO L225 Difference]: With dead ends: 84 [2018-10-01 00:00:36,522 INFO L226 Difference]: Without dead ends: 82 [2018-10-01 00:00:36,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:00:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-01 00:00:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-01 00:00:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-01 00:00:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-01 00:00:36,526 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-01 00:00:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:36,526 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-01 00:00:36,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-01 00:00:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-01 00:00:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-01 00:00:36,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:36,527 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-01 00:00:36,527 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:36,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:36,528 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-10-01 00:00:36,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:36,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:36,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:36,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:36,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:39,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:39,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:39,432 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:39,498 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-01 00:00:39,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:39,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:39,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:39,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2018-10-01 00:00:39,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-01 00:00:39,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-01 00:00:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:00:39,570 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-10-01 00:00:39,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:39,759 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-01 00:00:39,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-01 00:00:39,759 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-10-01 00:00:39,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:39,760 INFO L225 Difference]: With dead ends: 85 [2018-10-01 00:00:39,760 INFO L226 Difference]: Without dead ends: 83 [2018-10-01 00:00:39,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:00:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-01 00:00:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-01 00:00:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-01 00:00:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-01 00:00:39,765 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-01 00:00:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:39,765 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-01 00:00:39,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-01 00:00:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-01 00:00:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-01 00:00:39,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:39,766 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-01 00:00:39,766 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:39,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:39,767 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-10-01 00:00:39,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:39,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:39,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:39,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:39,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:42,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:42,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:42,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:42,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:43,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:43,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2018-10-01 00:00:43,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-01 00:00:43,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-01 00:00:43,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:00:43,021 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-10-01 00:00:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:43,195 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-01 00:00:43,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-01 00:00:43,195 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-10-01 00:00:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:43,196 INFO L225 Difference]: With dead ends: 86 [2018-10-01 00:00:43,196 INFO L226 Difference]: Without dead ends: 84 [2018-10-01 00:00:43,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:00:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-01 00:00:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-01 00:00:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-01 00:00:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-01 00:00:43,200 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-01 00:00:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:43,200 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-01 00:00:43,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-01 00:00:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-01 00:00:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-01 00:00:43,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:43,200 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-01 00:00:43,201 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:43,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-10-01 00:00:43,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:43,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:43,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:43,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:43,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:46,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:46,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:46,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:46,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:46,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:46,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:46,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:46,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2018-10-01 00:00:46,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-01 00:00:46,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-01 00:00:46,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:00:46,545 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-10-01 00:00:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:47,772 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-01 00:00:47,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-01 00:00:47,773 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-10-01 00:00:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:47,774 INFO L225 Difference]: With dead ends: 87 [2018-10-01 00:00:47,774 INFO L226 Difference]: Without dead ends: 85 [2018-10-01 00:00:47,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:00:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-01 00:00:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-01 00:00:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-01 00:00:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-01 00:00:47,777 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-01 00:00:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:47,778 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-01 00:00:47,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-01 00:00:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-01 00:00:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-01 00:00:47,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:47,778 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-01 00:00:47,779 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:47,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:47,779 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-10-01 00:00:47,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:47,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:47,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:47,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:47,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:51,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:51,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:51,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:51,243 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-01 00:00:51,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:51,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:51,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:51,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2018-10-01 00:00:51,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-01 00:00:51,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-01 00:00:51,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:00:51,300 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-10-01 00:00:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:51,503 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-01 00:00:51,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-01 00:00:51,504 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-10-01 00:00:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:51,505 INFO L225 Difference]: With dead ends: 88 [2018-10-01 00:00:51,505 INFO L226 Difference]: Without dead ends: 86 [2018-10-01 00:00:51,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:00:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-01 00:00:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-01 00:00:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-01 00:00:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-01 00:00:51,509 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-01 00:00:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:51,509 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-01 00:00:51,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-01 00:00:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-01 00:00:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-01 00:00:51,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:51,510 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-01 00:00:51,510 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:51,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-10-01 00:00:51,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:51,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:51,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:51,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:51,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:54,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:54,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:54,613 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:54,665 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:54,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:54,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:54,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:54,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2018-10-01 00:00:54,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-01 00:00:54,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-01 00:00:54,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:00:54,729 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-10-01 00:00:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:55,397 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-01 00:00:55,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-01 00:00:55,397 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-10-01 00:00:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:55,398 INFO L225 Difference]: With dead ends: 89 [2018-10-01 00:00:55,398 INFO L226 Difference]: Without dead ends: 87 [2018-10-01 00:00:55,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:00:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-01 00:00:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-01 00:00:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-01 00:00:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-01 00:00:55,402 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-01 00:00:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:55,402 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-01 00:00:55,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-01 00:00:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-01 00:00:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-01 00:00:55,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:55,403 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-01 00:00:55,403 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:55,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:55,403 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-10-01 00:00:55,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:55,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:55,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:55,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:55,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:58,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:58,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:58,382 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:58,462 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-01 00:00:58,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:58,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:58,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:58,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2018-10-01 00:00:58,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-01 00:00:58,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-01 00:00:58,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:00:58,514 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-10-01 00:00:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:58,806 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-01 00:00:58,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-01 00:00:58,807 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-10-01 00:00:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:58,807 INFO L225 Difference]: With dead ends: 90 [2018-10-01 00:00:58,807 INFO L226 Difference]: Without dead ends: 88 [2018-10-01 00:00:58,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:00:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-01 00:00:58,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-01 00:00:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-01 00:00:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-01 00:00:58,810 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-01 00:00:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:58,810 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-01 00:00:58,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-01 00:00:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-01 00:00:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-01 00:00:58,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:58,811 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-01 00:00:58,811 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:58,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:58,811 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-10-01 00:00:58,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:58,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:58,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:58,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:58,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:01,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:01,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:01,967 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:02,051 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-01 00:01:02,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:02,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:02,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:02,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2018-10-01 00:01:02,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-01 00:01:02,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-01 00:01:02,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:01:02,098 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-10-01 00:01:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:02,313 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-01 00:01:02,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-01 00:01:02,314 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-10-01 00:01:02,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:02,314 INFO L225 Difference]: With dead ends: 91 [2018-10-01 00:01:02,314 INFO L226 Difference]: Without dead ends: 89 [2018-10-01 00:01:02,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:01:02,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-01 00:01:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-01 00:01:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-01 00:01:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-01 00:01:02,318 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-01 00:01:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:02,318 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-01 00:01:02,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-01 00:01:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-01 00:01:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-01 00:01:02,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:02,319 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-01 00:01:02,319 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:02,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:02,320 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-10-01 00:01:02,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:02,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:02,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:02,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:02,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:05,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:05,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:05,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:05,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:05,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:05,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2018-10-01 00:01:05,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-01 00:01:05,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-01 00:01:05,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:01:05,798 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-10-01 00:01:05,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:05,944 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-01 00:01:05,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-01 00:01:05,944 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-10-01 00:01:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:05,945 INFO L225 Difference]: With dead ends: 92 [2018-10-01 00:01:05,946 INFO L226 Difference]: Without dead ends: 90 [2018-10-01 00:01:05,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:01:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-01 00:01:05,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-01 00:01:05,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-01 00:01:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-01 00:01:05,949 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-01 00:01:05,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:05,950 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-01 00:01:05,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-01 00:01:05,950 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-01 00:01:05,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-01 00:01:05,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:05,950 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-01 00:01:05,951 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:05,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:05,951 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-10-01 00:01:05,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:05,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:05,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:05,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:05,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:09,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:09,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:09,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:09,145 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:09,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:09,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:09,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:09,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2018-10-01 00:01:09,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-01 00:01:09,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-01 00:01:09,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:01:09,201 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-10-01 00:01:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:09,468 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-01 00:01:09,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-01 00:01:09,468 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-10-01 00:01:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:09,469 INFO L225 Difference]: With dead ends: 93 [2018-10-01 00:01:09,469 INFO L226 Difference]: Without dead ends: 91 [2018-10-01 00:01:09,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:01:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-01 00:01:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-01 00:01:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-01 00:01:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-01 00:01:09,471 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-01 00:01:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:09,472 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-01 00:01:09,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-01 00:01:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-01 00:01:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 00:01:09,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:09,472 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-01 00:01:09,472 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:09,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:09,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-10-01 00:01:09,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:09,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:09,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:09,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:09,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:12,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:12,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:12,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:12,815 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-01 00:01:12,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:12,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:12,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:12,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2018-10-01 00:01:12,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-01 00:01:12,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-01 00:01:12,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:01:12,875 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-10-01 00:01:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:13,024 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-01 00:01:13,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-01 00:01:13,024 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-10-01 00:01:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:13,025 INFO L225 Difference]: With dead ends: 94 [2018-10-01 00:01:13,025 INFO L226 Difference]: Without dead ends: 92 [2018-10-01 00:01:13,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-01 00:01:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-01 00:01:13,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-01 00:01:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-01 00:01:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-01 00:01:13,029 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-01 00:01:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:13,029 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-01 00:01:13,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-01 00:01:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-01 00:01:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-01 00:01:13,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:13,030 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-01 00:01:13,030 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:13,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:13,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-10-01 00:01:13,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:13,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:13,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:13,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:13,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:16,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:16,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:16,582 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:16,635 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:16,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:16,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:16,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:16,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2018-10-01 00:01:16,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-01 00:01:16,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-01 00:01:16,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-01 00:01:16,694 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-10-01 00:01:16,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:16,917 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-01 00:01:16,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-01 00:01:16,918 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-10-01 00:01:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:16,919 INFO L225 Difference]: With dead ends: 95 [2018-10-01 00:01:16,919 INFO L226 Difference]: Without dead ends: 93 [2018-10-01 00:01:16,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-01 00:01:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-01 00:01:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-01 00:01:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-01 00:01:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-01 00:01:16,922 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-01 00:01:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:16,923 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-01 00:01:16,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-01 00:01:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-01 00:01:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-01 00:01:16,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:16,923 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-01 00:01:16,923 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:16,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-10-01 00:01:16,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:16,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:16,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:16,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:16,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:20,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:20,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:20,433 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:20,574 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-01 00:01:20,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:20,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:20,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:20,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2018-10-01 00:01:20,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-01 00:01:20,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-01 00:01:20,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-01 00:01:20,725 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-10-01 00:01:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:20,938 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-01 00:01:20,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-01 00:01:20,938 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-10-01 00:01:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:20,939 INFO L225 Difference]: With dead ends: 96 [2018-10-01 00:01:20,939 INFO L226 Difference]: Without dead ends: 94 [2018-10-01 00:01:20,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-01 00:01:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-01 00:01:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-01 00:01:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-01 00:01:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-01 00:01:20,943 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-01 00:01:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:20,943 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-01 00:01:20,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-01 00:01:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-01 00:01:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-01 00:01:20,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:20,944 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-01 00:01:20,944 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:20,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:20,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-10-01 00:01:20,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:20,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:20,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:20,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:20,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:24,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:24,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:24,376 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:24,455 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-01 00:01:24,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:24,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:24,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:24,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2018-10-01 00:01:24,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-01 00:01:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-01 00:01:24,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-01 00:01:24,506 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-10-01 00:01:24,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:24,658 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-01 00:01:24,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-01 00:01:24,658 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-10-01 00:01:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:24,659 INFO L225 Difference]: With dead ends: 97 [2018-10-01 00:01:24,660 INFO L226 Difference]: Without dead ends: 95 [2018-10-01 00:01:24,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-01 00:01:24,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-01 00:01:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-01 00:01:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-01 00:01:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-01 00:01:24,664 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-01 00:01:24,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:24,665 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-01 00:01:24,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-01 00:01:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-01 00:01:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-01 00:01:24,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:24,665 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-01 00:01:24,666 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:24,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:24,666 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-10-01 00:01:24,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:24,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:24,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:24,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:24,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:28,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:28,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:28,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:28,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:28,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:28,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2018-10-01 00:01:28,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-01 00:01:28,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-01 00:01:28,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-01 00:01:28,523 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-10-01 00:01:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:28,672 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-01 00:01:28,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-01 00:01:28,673 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-10-01 00:01:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:28,674 INFO L225 Difference]: With dead ends: 98 [2018-10-01 00:01:28,674 INFO L226 Difference]: Without dead ends: 96 [2018-10-01 00:01:28,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-01 00:01:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-01 00:01:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-01 00:01:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-01 00:01:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-01 00:01:28,678 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-01 00:01:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:28,678 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-01 00:01:28,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-01 00:01:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-01 00:01:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-01 00:01:28,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:28,679 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-01 00:01:28,679 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:28,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:28,679 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-10-01 00:01:28,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:28,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:28,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:28,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:28,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:32,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:32,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:32,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:32,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:32,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:32,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:32,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:32,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2018-10-01 00:01:32,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-01 00:01:32,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-01 00:01:32,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-01 00:01:32,639 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-10-01 00:01:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:32,808 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-01 00:01:32,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-01 00:01:32,808 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-10-01 00:01:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:32,809 INFO L225 Difference]: With dead ends: 99 [2018-10-01 00:01:32,809 INFO L226 Difference]: Without dead ends: 97 [2018-10-01 00:01:32,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-01 00:01:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-01 00:01:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-01 00:01:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-01 00:01:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-01 00:01:32,812 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-01 00:01:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:32,813 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-01 00:01:32,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-01 00:01:32,813 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-01 00:01:32,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-01 00:01:32,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:32,813 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-01 00:01:32,813 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:32,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-10-01 00:01:32,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:32,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:32,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:32,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:32,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:36,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:36,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:36,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:36,844 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-01 00:01:36,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:36,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:36,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:36,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2018-10-01 00:01:36,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-01 00:01:36,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-01 00:01:36,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-01 00:01:36,906 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-10-01 00:01:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:37,084 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-01 00:01:37,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-01 00:01:37,085 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-10-01 00:01:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:37,086 INFO L225 Difference]: With dead ends: 100 [2018-10-01 00:01:37,086 INFO L226 Difference]: Without dead ends: 98 [2018-10-01 00:01:37,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-01 00:01:37,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-01 00:01:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-01 00:01:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-01 00:01:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-01 00:01:37,089 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-01 00:01:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:37,089 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-01 00:01:37,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-01 00:01:37,089 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-01 00:01:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-01 00:01:37,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:37,090 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-01 00:01:37,090 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:37,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:37,091 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-10-01 00:01:37,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:37,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:37,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:37,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:37,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:41,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:41,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:41,231 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:41,290 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:41,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:41,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:41,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:41,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2018-10-01 00:01:41,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-01 00:01:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-01 00:01:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-01 00:01:41,342 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-10-01 00:01:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:41,526 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-01 00:01:41,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-01 00:01:41,526 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-10-01 00:01:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:41,527 INFO L225 Difference]: With dead ends: 101 [2018-10-01 00:01:41,527 INFO L226 Difference]: Without dead ends: 99 [2018-10-01 00:01:41,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-01 00:01:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-01 00:01:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-01 00:01:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-01 00:01:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-01 00:01:41,532 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-01 00:01:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:41,532 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-01 00:01:41,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-01 00:01:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-01 00:01:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-01 00:01:41,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:41,533 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-01 00:01:41,533 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:41,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:41,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-10-01 00:01:41,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:41,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:41,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:41,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:41,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:45,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:45,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:45,270 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:45,364 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-01 00:01:45,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:45,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:45,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:45,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2018-10-01 00:01:45,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-01 00:01:45,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-01 00:01:45,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-01 00:01:45,415 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-10-01 00:01:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:45,668 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-01 00:01:45,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-01 00:01:45,669 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-10-01 00:01:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:45,670 INFO L225 Difference]: With dead ends: 102 [2018-10-01 00:01:45,670 INFO L226 Difference]: Without dead ends: 100 [2018-10-01 00:01:45,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-01 00:01:45,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-01 00:01:45,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-01 00:01:45,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-01 00:01:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-01 00:01:45,674 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-01 00:01:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:45,674 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-01 00:01:45,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-01 00:01:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-01 00:01:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-01 00:01:45,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:45,675 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-01 00:01:45,675 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:45,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-10-01 00:01:45,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:45,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:45,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:45,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:45,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:49,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:49,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:49,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:49,594 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-01 00:01:49,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:49,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:49,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:49,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2018-10-01 00:01:49,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-01 00:01:49,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-01 00:01:49,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-01 00:01:49,647 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-10-01 00:01:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:50,279 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-01 00:01:50,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-01 00:01:50,279 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-10-01 00:01:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:50,280 INFO L225 Difference]: With dead ends: 103 [2018-10-01 00:01:50,280 INFO L226 Difference]: Without dead ends: 101 [2018-10-01 00:01:50,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-01 00:01:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-01 00:01:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-01 00:01:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-01 00:01:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-01 00:01:50,284 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-01 00:01:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:50,285 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-01 00:01:50,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-01 00:01:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-01 00:01:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-01 00:01:50,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:50,285 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-01 00:01:50,285 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:50,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:50,286 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-10-01 00:01:50,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:50,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:50,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:50,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:50,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:54,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:54,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:54,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:54,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:54,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:54,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2018-10-01 00:01:54,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-01 00:01:54,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-01 00:01:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-01 00:01:54,623 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-10-01 00:01:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:54,862 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-01 00:01:54,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-01 00:01:54,863 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-10-01 00:01:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:54,864 INFO L225 Difference]: With dead ends: 104 [2018-10-01 00:01:54,864 INFO L226 Difference]: Without dead ends: 102 [2018-10-01 00:01:54,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-01 00:01:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-01 00:01:54,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-01 00:01:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-01 00:01:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-01 00:01:54,868 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-01 00:01:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:54,868 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-01 00:01:54,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-01 00:01:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-01 00:01:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-01 00:01:54,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:54,869 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-01 00:01:54,869 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:54,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:54,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-10-01 00:01:54,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:54,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:54,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:54,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:54,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:59,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:59,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:59,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:59,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:59,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:59,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:59,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:59,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2018-10-01 00:01:59,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-01 00:01:59,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-01 00:01:59,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-01 00:01:59,245 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-10-01 00:01:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:59,533 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-01 00:01:59,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-01 00:01:59,534 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-10-01 00:01:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:59,535 INFO L225 Difference]: With dead ends: 105 [2018-10-01 00:01:59,535 INFO L226 Difference]: Without dead ends: 103 [2018-10-01 00:01:59,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-01 00:01:59,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-01 00:01:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-01 00:01:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-01 00:01:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-01 00:01:59,539 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-01 00:01:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:59,539 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-01 00:01:59,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-01 00:01:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-01 00:01:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-01 00:01:59,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:59,540 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-01 00:01:59,540 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:59,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:59,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-10-01 00:01:59,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:59,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:59,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:59,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:59,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:03,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:03,849 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 [2018-10-01 00:02:03,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:03,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-01 00:02:03,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:03,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:04,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:04,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2018-10-01 00:02:04,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-01 00:02:04,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-01 00:02:04,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-01 00:02:04,017 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-10-01 00:02:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:04,209 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-01 00:02:04,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-01 00:02:04,210 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-10-01 00:02:04,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:04,211 INFO L225 Difference]: With dead ends: 106 [2018-10-01 00:02:04,211 INFO L226 Difference]: Without dead ends: 104 [2018-10-01 00:02:04,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-01 00:02:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-01 00:02:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-01 00:02:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-01 00:02:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-01 00:02:04,215 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-01 00:02:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:04,215 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-01 00:02:04,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-01 00:02:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-01 00:02:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-01 00:02:04,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:04,216 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-01 00:02:04,216 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:04,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-10-01 00:02:04,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:04,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:04,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:04,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:04,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:08,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:08,806 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 [2018-10-01 00:02:08,814 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:08,879 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:08,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:08,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:08,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:08,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2018-10-01 00:02:08,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-01 00:02:08,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-01 00:02:08,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:02:08,933 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-10-01 00:02:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:09,164 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-01 00:02:09,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-01 00:02:09,165 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-10-01 00:02:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:09,166 INFO L225 Difference]: With dead ends: 107 [2018-10-01 00:02:09,166 INFO L226 Difference]: Without dead ends: 105 [2018-10-01 00:02:09,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-01 00:02:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-01 00:02:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-01 00:02:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-01 00:02:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-01 00:02:09,170 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-01 00:02:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:09,170 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-01 00:02:09,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-01 00:02:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-01 00:02:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-01 00:02:09,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:09,171 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-01 00:02:09,171 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:09,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:09,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-10-01 00:02:09,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:09,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:09,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:09,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:09,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:13,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:13,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:13,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:13,841 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-01 00:02:13,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:13,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:13,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:13,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2018-10-01 00:02:13,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-01 00:02:13,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-01 00:02:13,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-01 00:02:13,900 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 105 states. [2018-10-01 00:02:14,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:14,222 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-01 00:02:14,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-01 00:02:14,222 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 104 [2018-10-01 00:02:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:14,224 INFO L225 Difference]: With dead ends: 108 [2018-10-01 00:02:14,224 INFO L226 Difference]: Without dead ends: 106 [2018-10-01 00:02:14,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-01 00:02:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-01 00:02:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-01 00:02:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-01 00:02:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-01 00:02:14,228 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-01 00:02:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:14,228 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-01 00:02:14,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-01 00:02:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-01 00:02:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-01 00:02:14,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:14,229 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-01 00:02:14,230 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:14,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:14,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-10-01 00:02:14,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:14,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:14,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:14,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:14,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:18,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:18,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:18,974 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:19,071 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-01 00:02:19,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:19,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:19,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:19,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2018-10-01 00:02:19,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-01 00:02:19,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-01 00:02:19,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-01 00:02:19,136 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-10-01 00:02:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:19,396 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-01 00:02:19,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-01 00:02:19,396 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-10-01 00:02:19,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:19,397 INFO L225 Difference]: With dead ends: 109 [2018-10-01 00:02:19,398 INFO L226 Difference]: Without dead ends: 107 [2018-10-01 00:02:19,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-01 00:02:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-01 00:02:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-01 00:02:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-01 00:02:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-01 00:02:19,402 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-01 00:02:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:19,402 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-01 00:02:19,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-01 00:02:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-01 00:02:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-01 00:02:19,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:19,403 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-01 00:02:19,403 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:19,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:19,403 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-10-01 00:02:19,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:19,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:19,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:19,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:19,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:24,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:24,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:24,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:24,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:24,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:24,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2018-10-01 00:02:24,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-01 00:02:24,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-01 00:02:24,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:02:24,343 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 107 states. [2018-10-01 00:02:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:24,563 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-01 00:02:24,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-01 00:02:24,563 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 106 [2018-10-01 00:02:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:24,564 INFO L225 Difference]: With dead ends: 110 [2018-10-01 00:02:24,564 INFO L226 Difference]: Without dead ends: 108 [2018-10-01 00:02:24,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-01 00:02:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-01 00:02:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-01 00:02:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-01 00:02:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-01 00:02:24,568 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-01 00:02:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:24,568 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-01 00:02:24,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-01 00:02:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-01 00:02:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-01 00:02:24,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:24,569 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-01 00:02:24,569 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:24,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:24,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-10-01 00:02:24,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:24,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:24,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:24,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:24,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:29,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:29,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:29,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:02:29,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:29,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:29,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:29,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:29,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 107 [2018-10-01 00:02:29,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-01 00:02:29,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-01 00:02:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-01 00:02:29,621 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-10-01 00:02:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:29,986 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-01 00:02:29,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-01 00:02:29,987 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-10-01 00:02:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:29,987 INFO L225 Difference]: With dead ends: 111 [2018-10-01 00:02:29,988 INFO L226 Difference]: Without dead ends: 109 [2018-10-01 00:02:29,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-01 00:02:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-01 00:02:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-01 00:02:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-01 00:02:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-01 00:02:29,992 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-01 00:02:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:29,992 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-01 00:02:29,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-01 00:02:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-01 00:02:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-01 00:02:29,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:29,993 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-01 00:02:29,993 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:29,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:29,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-10-01 00:02:29,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:29,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:29,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:29,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:29,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:34,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:34,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:34,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:34,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-01 00:02:34,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:34,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:35,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:35,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2018-10-01 00:02:35,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-01 00:02:35,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-01 00:02:35,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-01 00:02:35,041 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 109 states. [2018-10-01 00:02:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:35,318 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-01 00:02:35,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-01 00:02:35,318 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 108 [2018-10-01 00:02:35,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:35,319 INFO L225 Difference]: With dead ends: 112 [2018-10-01 00:02:35,319 INFO L226 Difference]: Without dead ends: 110 [2018-10-01 00:02:35,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-01 00:02:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-01 00:02:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-01 00:02:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-01 00:02:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-01 00:02:35,323 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-01 00:02:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:35,323 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-01 00:02:35,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-01 00:02:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-01 00:02:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-01 00:02:35,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:35,324 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-01 00:02:35,324 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:35,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:35,324 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-10-01 00:02:35,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:35,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:35,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:35,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:35,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:40,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:40,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:40,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:40,352 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:40,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:40,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:40,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:40,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2018-10-01 00:02:40,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-01 00:02:40,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-01 00:02:40,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-01 00:02:40,408 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-10-01 00:02:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:40,604 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-01 00:02:40,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-01 00:02:40,604 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-10-01 00:02:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:40,605 INFO L225 Difference]: With dead ends: 113 [2018-10-01 00:02:40,605 INFO L226 Difference]: Without dead ends: 111 [2018-10-01 00:02:40,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-01 00:02:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-01 00:02:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-01 00:02:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-01 00:02:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-01 00:02:40,609 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-01 00:02:40,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:40,610 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-01 00:02:40,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-01 00:02:40,610 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-01 00:02:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-01 00:02:40,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:40,610 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-01 00:02:40,610 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:40,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-10-01 00:02:40,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:40,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:40,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:40,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:40,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:45,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:45,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:45,747 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:45,857 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-01 00:02:45,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:45,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:45,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:45,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 110 [2018-10-01 00:02:45,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-01 00:02:45,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-01 00:02:45,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-01 00:02:45,939 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 111 states. [2018-10-01 00:02:46,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:46,290 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-01 00:02:46,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-01 00:02:46,290 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 110 [2018-10-01 00:02:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:46,291 INFO L225 Difference]: With dead ends: 114 [2018-10-01 00:02:46,291 INFO L226 Difference]: Without dead ends: 112 [2018-10-01 00:02:46,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-01 00:02:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-01 00:02:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-01 00:02:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-01 00:02:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-01 00:02:46,295 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-10-01 00:02:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:46,295 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-01 00:02:46,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-01 00:02:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-01 00:02:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-01 00:02:46,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:46,295 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-10-01 00:02:46,296 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:46,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:46,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-10-01 00:02:46,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:46,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:46,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:46,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:46,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:51,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:51,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:51,491 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:51,594 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-01 00:02:51,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:51,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:51,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:51,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 111 [2018-10-01 00:02:51,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-01 00:02:51,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-01 00:02:51,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-01 00:02:51,657 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-10-01 00:02:52,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:52,051 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-01 00:02:52,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-01 00:02:52,051 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-10-01 00:02:52,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:52,052 INFO L225 Difference]: With dead ends: 115 [2018-10-01 00:02:52,052 INFO L226 Difference]: Without dead ends: 113 [2018-10-01 00:02:52,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-01 00:02:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-01 00:02:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-01 00:02:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-01 00:02:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-01 00:02:52,055 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-10-01 00:02:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:52,055 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-01 00:02:52,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-01 00:02:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-01 00:02:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-01 00:02:52,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:52,056 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-10-01 00:02:52,056 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:52,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:52,056 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-10-01 00:02:52,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:52,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:52,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:52,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:52,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:57,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:57,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:57,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:57,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:57,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:57,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 112 [2018-10-01 00:02:57,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-01 00:02:57,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-01 00:02:57,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-01 00:02:57,358 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 113 states. [2018-10-01 00:02:57,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:57,735 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-10-01 00:02:57,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-01 00:02:57,735 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 112 [2018-10-01 00:02:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:57,736 INFO L225 Difference]: With dead ends: 116 [2018-10-01 00:02:57,736 INFO L226 Difference]: Without dead ends: 114 [2018-10-01 00:02:57,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-01 00:02:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-01 00:02:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-01 00:02:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-01 00:02:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-01 00:02:57,740 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-10-01 00:02:57,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:57,740 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-01 00:02:57,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-01 00:02:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-01 00:02:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-01 00:02:57,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:57,741 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-10-01 00:02:57,741 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:57,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:57,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-10-01 00:02:57,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:57,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:57,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:57,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:57,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:02,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:02,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:02,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:03,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:03,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:03,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:03,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:03,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 113 [2018-10-01 00:03:03,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-01 00:03:03,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-01 00:03:03,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-10-01 00:03:03,092 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-10-01 00:03:03,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:03,466 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-01 00:03:03,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-01 00:03:03,466 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-10-01 00:03:03,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:03,467 INFO L225 Difference]: With dead ends: 117 [2018-10-01 00:03:03,467 INFO L226 Difference]: Without dead ends: 115 [2018-10-01 00:03:03,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-10-01 00:03:03,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-01 00:03:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-01 00:03:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-01 00:03:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-01 00:03:03,472 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-10-01 00:03:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:03,472 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-01 00:03:03,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-01 00:03:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-01 00:03:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-01 00:03:03,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:03,473 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-10-01 00:03:03,473 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:03,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-10-01 00:03:03,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:03,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:03,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:03,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:03,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:09,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:09,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:09,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:09,169 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-10-01 00:03:09,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:09,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:09,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:09,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 114 [2018-10-01 00:03:09,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-10-01 00:03:09,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-10-01 00:03:09,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-10-01 00:03:09,236 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 115 states. [2018-10-01 00:03:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:09,630 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-01 00:03:09,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-01 00:03:09,630 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 114 [2018-10-01 00:03:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:09,631 INFO L225 Difference]: With dead ends: 118 [2018-10-01 00:03:09,631 INFO L226 Difference]: Without dead ends: 116 [2018-10-01 00:03:09,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-10-01 00:03:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-01 00:03:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-01 00:03:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-01 00:03:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-01 00:03:09,636 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-10-01 00:03:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:09,636 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-01 00:03:09,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-10-01 00:03:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-01 00:03:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-01 00:03:09,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:09,637 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-10-01 00:03:09,637 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:09,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:09,637 INFO L82 PathProgramCache]: Analyzing trace with hash -467222688, now seen corresponding path program 112 times [2018-10-01 00:03:09,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:09,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:09,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:09,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:09,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:15,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:15,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:15,235 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:03:15,307 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:03:15,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:15,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:15,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:15,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 115 [2018-10-01 00:03:15,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-01 00:03:15,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-01 00:03:15,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-10-01 00:03:15,383 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-10-01 00:03:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:15,708 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-01 00:03:15,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-10-01 00:03:15,709 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-10-01 00:03:15,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:15,709 INFO L225 Difference]: With dead ends: 119 [2018-10-01 00:03:15,710 INFO L226 Difference]: Without dead ends: 117 [2018-10-01 00:03:15,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-10-01 00:03:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-01 00:03:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-01 00:03:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-01 00:03:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-01 00:03:15,713 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-10-01 00:03:15,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:15,714 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-01 00:03:15,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-01 00:03:15,714 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-01 00:03:15,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-01 00:03:15,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:15,714 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-10-01 00:03:15,714 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:15,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:15,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1599005306, now seen corresponding path program 113 times [2018-10-01 00:03:15,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:15,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:15,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:15,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:15,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:21,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:21,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:21,317 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:03:21,438 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-10-01 00:03:21,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:21,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:21,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:21,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 116 [2018-10-01 00:03:21,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-10-01 00:03:21,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-10-01 00:03:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-10-01 00:03:21,498 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 117 states. [2018-10-01 00:03:21,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:21,810 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-10-01 00:03:21,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-10-01 00:03:21,810 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 116 [2018-10-01 00:03:21,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:21,811 INFO L225 Difference]: With dead ends: 120 [2018-10-01 00:03:21,811 INFO L226 Difference]: Without dead ends: 118 [2018-10-01 00:03:21,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-10-01 00:03:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-10-01 00:03:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-10-01 00:03:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-01 00:03:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-01 00:03:21,814 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-10-01 00:03:21,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:21,815 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-01 00:03:21,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-10-01 00:03:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-01 00:03:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-01 00:03:21,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:21,815 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-10-01 00:03:21,815 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:21,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:21,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1970439200, now seen corresponding path program 114 times [2018-10-01 00:03:21,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:21,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:21,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:21,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:21,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:27,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:27,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:27,364 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:03:27,476 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-10-01 00:03:27,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:27,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:27,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:27,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 117 [2018-10-01 00:03:27,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-01 00:03:27,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-01 00:03:27,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-10-01 00:03:27,543 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-10-01 00:03:27,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:27,908 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-01 00:03:27,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-10-01 00:03:27,908 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-10-01 00:03:27,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:27,909 INFO L225 Difference]: With dead ends: 121 [2018-10-01 00:03:27,909 INFO L226 Difference]: Without dead ends: 119 [2018-10-01 00:03:27,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-10-01 00:03:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-01 00:03:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-01 00:03:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-01 00:03:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-01 00:03:27,913 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-10-01 00:03:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:27,913 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-01 00:03:27,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-01 00:03:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-01 00:03:27,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-01 00:03:27,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:27,913 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-10-01 00:03:27,914 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:27,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:27,914 INFO L82 PathProgramCache]: Analyzing trace with hash 954069190, now seen corresponding path program 115 times [2018-10-01 00:03:27,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:27,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:27,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:27,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:27,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:33,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:33,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:33,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:33,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:33,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:33,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 118 [2018-10-01 00:03:33,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-10-01 00:03:33,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-10-01 00:03:33,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-10-01 00:03:33,801 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 119 states. [2018-10-01 00:03:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:34,130 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-01 00:03:34,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-01 00:03:34,131 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 118 [2018-10-01 00:03:34,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:34,131 INFO L225 Difference]: With dead ends: 122 [2018-10-01 00:03:34,131 INFO L226 Difference]: Without dead ends: 120 [2018-10-01 00:03:34,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-10-01 00:03:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-01 00:03:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-01 00:03:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-01 00:03:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-01 00:03:34,135 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-10-01 00:03:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:34,135 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-01 00:03:34,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-10-01 00:03:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-01 00:03:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-01 00:03:34,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:34,136 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-10-01 00:03:34,136 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:34,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash -488630048, now seen corresponding path program 116 times [2018-10-01 00:03:34,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:34,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:34,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:34,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:34,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:40,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:40,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:40,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:40,148 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:40,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:40,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:40,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:40,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 119 [2018-10-01 00:03:40,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-01 00:03:40,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-01 00:03:40,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-10-01 00:03:40,206 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-10-01 00:03:40,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:40,549 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-01 00:03:40,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-01 00:03:40,550 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-10-01 00:03:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:40,551 INFO L225 Difference]: With dead ends: 123 [2018-10-01 00:03:40,551 INFO L226 Difference]: Without dead ends: 121 [2018-10-01 00:03:40,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-10-01 00:03:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-01 00:03:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-01 00:03:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-01 00:03:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-01 00:03:40,554 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-10-01 00:03:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:40,554 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-01 00:03:40,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-01 00:03:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-01 00:03:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-01 00:03:40,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:40,555 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-10-01 00:03:40,555 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:40,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:40,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2032333830, now seen corresponding path program 117 times [2018-10-01 00:03:40,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:40,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:40,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:40,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:40,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:46,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:46,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:46,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:46,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-10-01 00:03:46,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:46,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:46,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:46,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 120 [2018-10-01 00:03:46,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-10-01 00:03:46,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-10-01 00:03:46,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-10-01 00:03:46,837 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 121 states. [2018-10-01 00:03:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:47,282 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-10-01 00:03:47,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-01 00:03:47,283 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 120 [2018-10-01 00:03:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:47,284 INFO L225 Difference]: With dead ends: 124 [2018-10-01 00:03:47,284 INFO L226 Difference]: Without dead ends: 122 [2018-10-01 00:03:47,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-10-01 00:03:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-01 00:03:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-10-01 00:03:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-01 00:03:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-01 00:03:47,287 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-10-01 00:03:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:47,287 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-01 00:03:47,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-10-01 00:03:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-01 00:03:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-01 00:03:47,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:47,288 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-10-01 00:03:47,288 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:47,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:47,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1422164576, now seen corresponding path program 118 times [2018-10-01 00:03:47,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:47,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:47,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:47,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:47,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:53,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:53,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:53,696 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:03:53,773 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:03:53,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:53,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:53,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:53,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 121 [2018-10-01 00:03:53,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-01 00:03:53,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-01 00:03:53,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-10-01 00:03:53,836 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-10-01 00:03:54,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:54,059 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-01 00:03:54,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-01 00:03:54,060 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-10-01 00:03:54,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:54,060 INFO L225 Difference]: With dead ends: 125 [2018-10-01 00:03:54,061 INFO L226 Difference]: Without dead ends: 123 [2018-10-01 00:03:54,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-10-01 00:03:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-01 00:03:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-01 00:03:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-01 00:03:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-01 00:03:54,065 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-10-01 00:03:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:54,065 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-01 00:03:54,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-01 00:03:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-01 00:03:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-01 00:03:54,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:54,066 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-10-01 00:03:54,066 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:54,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1137432762, now seen corresponding path program 119 times [2018-10-01 00:03:54,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:54,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:54,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:54,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:54,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:00,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:00,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:00,089 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:04:00,219 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-10-01 00:04:00,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:00,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:00,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:00,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 122 [2018-10-01 00:04:00,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-10-01 00:04:00,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-10-01 00:04:00,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-10-01 00:04:00,295 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 123 states. [2018-10-01 00:04:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:00,764 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-10-01 00:04:00,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-01 00:04:00,765 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 122 [2018-10-01 00:04:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:00,765 INFO L225 Difference]: With dead ends: 126 [2018-10-01 00:04:00,765 INFO L226 Difference]: Without dead ends: 124 [2018-10-01 00:04:00,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-10-01 00:04:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-01 00:04:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-01 00:04:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-01 00:04:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-01 00:04:00,770 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-10-01 00:04:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:00,771 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-01 00:04:00,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-10-01 00:04:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-01 00:04:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-01 00:04:00,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:00,772 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-10-01 00:04:00,772 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:00,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:00,772 INFO L82 PathProgramCache]: Analyzing trace with hash -900681120, now seen corresponding path program 120 times [2018-10-01 00:04:00,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:00,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:00,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:00,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:00,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:07,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:07,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:07,148 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:04:07,271 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-01 00:04:07,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:07,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:07,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:07,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 123 [2018-10-01 00:04:07,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-01 00:04:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-01 00:04:07,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-10-01 00:04:07,332 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-01 00:04:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:07,729 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-01 00:04:07,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-10-01 00:04:07,729 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-01 00:04:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:07,730 INFO L225 Difference]: With dead ends: 127 [2018-10-01 00:04:07,730 INFO L226 Difference]: Without dead ends: 125 [2018-10-01 00:04:07,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-10-01 00:04:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-01 00:04:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-01 00:04:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-01 00:04:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-01 00:04:07,734 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-10-01 00:04:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:07,734 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-01 00:04:07,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-01 00:04:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-01 00:04:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-01 00:04:07,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:07,735 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-10-01 00:04:07,735 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:07,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2143652486, now seen corresponding path program 121 times [2018-10-01 00:04:07,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:07,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:07,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:07,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:07,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:14,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:14,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:14,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:14,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:14,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:14,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 124 [2018-10-01 00:04:14,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-01 00:04:14,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-01 00:04:14,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-10-01 00:04:14,466 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 125 states. [2018-10-01 00:04:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:14,925 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-10-01 00:04:14,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-10-01 00:04:14,925 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 124 [2018-10-01 00:04:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:14,926 INFO L225 Difference]: With dead ends: 128 [2018-10-01 00:04:14,926 INFO L226 Difference]: Without dead ends: 126 [2018-10-01 00:04:14,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-10-01 00:04:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-01 00:04:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-01 00:04:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-01 00:04:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-01 00:04:14,930 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-10-01 00:04:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:14,931 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-01 00:04:14,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-01 00:04:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-01 00:04:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-01 00:04:14,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:14,931 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-10-01 00:04:14,931 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:14,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2028713760, now seen corresponding path program 122 times [2018-10-01 00:04:14,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:14,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:14,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:14,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:14,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:21,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:21,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:21,336 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:21,406 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:21,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:21,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:21,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:21,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 125 [2018-10-01 00:04:21,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-01 00:04:21,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-01 00:04:21,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-10-01 00:04:21,470 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-01 00:04:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:21,959 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-01 00:04:21,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-10-01 00:04:21,960 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-01 00:04:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:21,960 INFO L225 Difference]: With dead ends: 129 [2018-10-01 00:04:21,960 INFO L226 Difference]: Without dead ends: 127 [2018-10-01 00:04:21,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-10-01 00:04:21,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-01 00:04:21,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-01 00:04:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-01 00:04:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-01 00:04:21,965 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-10-01 00:04:21,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:21,965 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-01 00:04:21,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-01 00:04:21,965 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-01 00:04:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-01 00:04:21,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:21,966 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-10-01 00:04:21,966 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:21,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:21,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1534386746, now seen corresponding path program 123 times [2018-10-01 00:04:21,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:21,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:21,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:21,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:21,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:28,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:28,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:28,419 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:04:28,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-10-01 00:04:28,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:28,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:28,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:28,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 126 [2018-10-01 00:04:28,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-10-01 00:04:28,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-10-01 00:04:28,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-10-01 00:04:28,633 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 127 states. [2018-10-01 00:04:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:29,189 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-01 00:04:29,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-10-01 00:04:29,190 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 126 [2018-10-01 00:04:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:29,190 INFO L225 Difference]: With dead ends: 130 [2018-10-01 00:04:29,190 INFO L226 Difference]: Without dead ends: 128 [2018-10-01 00:04:29,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-10-01 00:04:29,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-01 00:04:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-10-01 00:04:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-01 00:04:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-01 00:04:29,194 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-10-01 00:04:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:29,195 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-01 00:04:29,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-10-01 00:04:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-01 00:04:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-01 00:04:29,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:29,196 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-10-01 00:04:29,196 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:29,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:29,196 INFO L82 PathProgramCache]: Analyzing trace with hash -321352736, now seen corresponding path program 124 times [2018-10-01 00:04:29,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:29,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:29,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:29,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:29,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:35,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:35,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:35,823 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:04:35,905 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:04:35,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:35,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:35,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:35,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 127 [2018-10-01 00:04:35,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-01 00:04:35,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-01 00:04:35,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-10-01 00:04:35,972 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-10-01 00:04:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:36,433 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-01 00:04:36,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-10-01 00:04:36,433 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-10-01 00:04:36,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:36,434 INFO L225 Difference]: With dead ends: 131 [2018-10-01 00:04:36,434 INFO L226 Difference]: Without dead ends: 129 [2018-10-01 00:04:36,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-10-01 00:04:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-01 00:04:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-01 00:04:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-01 00:04:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-01 00:04:36,438 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-10-01 00:04:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:36,439 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-01 00:04:36,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-01 00:04:36,439 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-01 00:04:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-01 00:04:36,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:36,439 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-10-01 00:04:36,439 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:36,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:36,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1372004090, now seen corresponding path program 125 times [2018-10-01 00:04:36,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:36,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:36,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:36,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:36,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:43,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:43,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:43,110 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:04:43,249 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-10-01 00:04:43,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:43,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:43,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:43,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 128 [2018-10-01 00:04:43,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-10-01 00:04:43,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-10-01 00:04:43,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-10-01 00:04:43,324 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 129 states. [2018-10-01 00:04:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:43,769 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-10-01 00:04:43,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-10-01 00:04:43,770 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 128 [2018-10-01 00:04:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:43,770 INFO L225 Difference]: With dead ends: 132 [2018-10-01 00:04:43,771 INFO L226 Difference]: Without dead ends: 130 [2018-10-01 00:04:43,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-10-01 00:04:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-01 00:04:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-10-01 00:04:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-01 00:04:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-10-01 00:04:43,776 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-10-01 00:04:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:43,776 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-10-01 00:04:43,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-10-01 00:04:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-10-01 00:04:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-01 00:04:43,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:43,777 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-10-01 00:04:43,777 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:43,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:43,777 INFO L82 PathProgramCache]: Analyzing trace with hash 417542304, now seen corresponding path program 126 times [2018-10-01 00:04:43,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:43,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:43,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:43,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:43,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:50,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:50,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:50,799 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:04:50,927 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-10-01 00:04:50,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:50,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:51,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:51,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 129 [2018-10-01 00:04:51,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-01 00:04:51,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-01 00:04:51,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-10-01 00:04:51,002 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-10-01 00:04:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:51,422 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-01 00:04:51,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-10-01 00:04:51,423 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-10-01 00:04:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:51,423 INFO L225 Difference]: With dead ends: 133 [2018-10-01 00:04:51,424 INFO L226 Difference]: Without dead ends: 131 [2018-10-01 00:04:51,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-10-01 00:04:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-01 00:04:51,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-01 00:04:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-01 00:04:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-01 00:04:51,427 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-10-01 00:04:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:51,428 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-01 00:04:51,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-01 00:04:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-01 00:04:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-01 00:04:51,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:51,428 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-10-01 00:04:51,429 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:51,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:51,429 INFO L82 PathProgramCache]: Analyzing trace with hash 58905670, now seen corresponding path program 127 times [2018-10-01 00:04:51,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:51,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:51,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:51,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:51,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:58,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:58,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:58,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:58,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:58,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:58,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 130 [2018-10-01 00:04:58,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-10-01 00:04:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-10-01 00:04:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-10-01 00:04:58,486 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 131 states. [2018-10-01 00:04:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:58,972 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-10-01 00:04:58,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-10-01 00:04:58,973 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 130 [2018-10-01 00:04:58,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:58,974 INFO L225 Difference]: With dead ends: 134 [2018-10-01 00:04:58,974 INFO L226 Difference]: Without dead ends: 132 [2018-10-01 00:04:58,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-10-01 00:04:58,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-01 00:04:58,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-01 00:04:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-01 00:04:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-10-01 00:04:58,979 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-10-01 00:04:58,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:58,979 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-10-01 00:04:58,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-10-01 00:04:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-10-01 00:04:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-01 00:04:58,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:58,980 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-10-01 00:04:58,980 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:58,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1826071904, now seen corresponding path program 128 times [2018-10-01 00:04:58,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:58,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:58,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:58,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:58,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:06,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:06,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:06,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:06,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:06,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:06,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:06,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:06,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 131 [2018-10-01 00:05:06,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-01 00:05:06,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-01 00:05:06,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-10-01 00:05:06,500 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-10-01 00:05:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:06,998 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-01 00:05:06,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-10-01 00:05:06,998 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-10-01 00:05:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:06,999 INFO L225 Difference]: With dead ends: 135 [2018-10-01 00:05:06,999 INFO L226 Difference]: Without dead ends: 133 [2018-10-01 00:05:07,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-10-01 00:05:07,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-01 00:05:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-01 00:05:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-01 00:05:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-01 00:05:07,003 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-10-01 00:05:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:07,004 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-01 00:05:07,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-01 00:05:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-01 00:05:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-01 00:05:07,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:07,004 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-10-01 00:05:07,005 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:07,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:07,005 INFO L82 PathProgramCache]: Analyzing trace with hash 773650310, now seen corresponding path program 129 times [2018-10-01 00:05:07,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:07,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:07,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:07,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:07,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:14,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:14,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:14,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:14,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-10-01 00:05:14,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:14,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:14,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:14,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 132 [2018-10-01 00:05:14,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-10-01 00:05:14,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-10-01 00:05:14,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-10-01 00:05:14,324 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 133 states. [2018-10-01 00:05:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:14,806 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-10-01 00:05:14,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-10-01 00:05:14,806 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 132 [2018-10-01 00:05:14,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:14,807 INFO L225 Difference]: With dead ends: 136 [2018-10-01 00:05:14,807 INFO L226 Difference]: Without dead ends: 134 [2018-10-01 00:05:14,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-10-01 00:05:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-01 00:05:14,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-10-01 00:05:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-01 00:05:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-01 00:05:14,810 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-10-01 00:05:14,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:14,811 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-01 00:05:14,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-10-01 00:05:14,811 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-01 00:05:14,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-01 00:05:14,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:14,811 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-10-01 00:05:14,812 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:14,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1786648032, now seen corresponding path program 130 times [2018-10-01 00:05:14,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:14,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:14,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:14,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:14,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:22,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:22,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:22,243 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:22,329 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:22,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:22,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:22,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:22,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 133 [2018-10-01 00:05:22,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-01 00:05:22,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-01 00:05:22,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-10-01 00:05:22,395 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-10-01 00:05:22,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:22,847 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-01 00:05:22,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-10-01 00:05:22,848 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-10-01 00:05:22,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:22,848 INFO L225 Difference]: With dead ends: 137 [2018-10-01 00:05:22,848 INFO L226 Difference]: Without dead ends: 135 [2018-10-01 00:05:22,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-10-01 00:05:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-01 00:05:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-01 00:05:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-01 00:05:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-01 00:05:22,852 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-10-01 00:05:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:22,852 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-01 00:05:22,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-01 00:05:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-01 00:05:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-01 00:05:22,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:22,852 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-10-01 00:05:22,852 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:22,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash 448481990, now seen corresponding path program 131 times [2018-10-01 00:05:22,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:22,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:22,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:22,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:22,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:30,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:30,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:30,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:30,208 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-10-01 00:05:30,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:30,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:30,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:30,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 134 [2018-10-01 00:05:30,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-10-01 00:05:30,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-10-01 00:05:30,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-10-01 00:05:30,275 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 135 states. [2018-10-01 00:05:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:30,812 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-10-01 00:05:30,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-10-01 00:05:30,812 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 134 [2018-10-01 00:05:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:30,813 INFO L225 Difference]: With dead ends: 138 [2018-10-01 00:05:30,813 INFO L226 Difference]: Without dead ends: 136 [2018-10-01 00:05:30,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-10-01 00:05:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-01 00:05:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-01 00:05:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-01 00:05:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-10-01 00:05:30,816 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-10-01 00:05:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:30,816 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-10-01 00:05:30,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-10-01 00:05:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-10-01 00:05:30,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-01 00:05:30,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:30,816 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-10-01 00:05:30,817 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:30,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:30,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1018035936, now seen corresponding path program 132 times [2018-10-01 00:05:30,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:30,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:30,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:30,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:30,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:38,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:38,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:38,309 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:38,453 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-01 00:05:38,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:38,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:38,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:38,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 135 [2018-10-01 00:05:38,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-10-01 00:05:38,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-10-01 00:05:38,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-10-01 00:05:38,519 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-10-01 00:05:38,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:38,833 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-01 00:05:38,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-01 00:05:38,834 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-10-01 00:05:38,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:38,835 INFO L225 Difference]: With dead ends: 139 [2018-10-01 00:05:38,835 INFO L226 Difference]: Without dead ends: 137 [2018-10-01 00:05:38,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-10-01 00:05:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-01 00:05:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-01 00:05:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-01 00:05:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-01 00:05:38,839 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-10-01 00:05:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:38,839 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-01 00:05:38,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-10-01 00:05:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-01 00:05:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-01 00:05:38,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:38,839 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-10-01 00:05:38,840 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:38,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1494339078, now seen corresponding path program 133 times [2018-10-01 00:05:38,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:38,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:38,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:38,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:38,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:46,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:46,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:46,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:46,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:46,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:46,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 136 [2018-10-01 00:05:46,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-10-01 00:05:46,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-10-01 00:05:46,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-10-01 00:05:46,707 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 137 states. [2018-10-01 00:05:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:47,143 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-10-01 00:05:47,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-10-01 00:05:47,143 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 136 [2018-10-01 00:05:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:47,143 INFO L225 Difference]: With dead ends: 140 [2018-10-01 00:05:47,143 INFO L226 Difference]: Without dead ends: 138 [2018-10-01 00:05:47,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-10-01 00:05:47,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-01 00:05:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-01 00:05:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-01 00:05:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-01 00:05:47,146 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-10-01 00:05:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:47,146 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-01 00:05:47,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-10-01 00:05:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-01 00:05:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-01 00:05:47,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:47,147 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-10-01 00:05:47,147 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:47,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:47,148 INFO L82 PathProgramCache]: Analyzing trace with hash -920132704, now seen corresponding path program 134 times [2018-10-01 00:05:47,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:47,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:47,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:47,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:47,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:54,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:54,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:54,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:54,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:54,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:54,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:54,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:54,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 137 [2018-10-01 00:05:54,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-01 00:05:54,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-01 00:05:54,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-10-01 00:05:54,850 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-10-01 00:05:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:55,413 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-01 00:05:55,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-10-01 00:05:55,414 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-10-01 00:05:55,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:55,415 INFO L225 Difference]: With dead ends: 141 [2018-10-01 00:05:55,415 INFO L226 Difference]: Without dead ends: 139 [2018-10-01 00:05:55,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-10-01 00:05:55,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-01 00:05:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-01 00:05:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-01 00:05:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-01 00:05:55,418 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-10-01 00:05:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:55,419 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-01 00:05:55,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-01 00:05:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-01 00:05:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-01 00:05:55,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:55,420 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-10-01 00:05:55,420 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:55,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:55,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1540653382, now seen corresponding path program 135 times [2018-10-01 00:05:55,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:55,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:55,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:55,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:55,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:03,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:03,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:03,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:03,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-10-01 00:06:03,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:03,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:03,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:03,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 138 [2018-10-01 00:06:03,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-10-01 00:06:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-10-01 00:06:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-10-01 00:06:03,688 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 139 states. [2018-10-01 00:06:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:04,241 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-01 00:06:04,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-01 00:06:04,241 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 138 [2018-10-01 00:06:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:04,242 INFO L225 Difference]: With dead ends: 142 [2018-10-01 00:06:04,242 INFO L226 Difference]: Without dead ends: 140 [2018-10-01 00:06:04,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-10-01 00:06:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-01 00:06:04,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-10-01 00:06:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-01 00:06:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-01 00:06:04,246 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-10-01 00:06:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:04,246 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-01 00:06:04,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-10-01 00:06:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-01 00:06:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-01 00:06:04,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:04,247 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-10-01 00:06:04,247 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:04,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:04,247 INFO L82 PathProgramCache]: Analyzing trace with hash 515610720, now seen corresponding path program 136 times [2018-10-01 00:06:04,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:04,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:04,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:04,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:04,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:12,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:12,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:12,366 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:12,458 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:12,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:12,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:12,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:12,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 139 [2018-10-01 00:06:12,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-01 00:06:12,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-01 00:06:12,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-10-01 00:06:12,528 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-10-01 00:06:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:12,850 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-01 00:06:12,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-10-01 00:06:12,851 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-10-01 00:06:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:12,851 INFO L225 Difference]: With dead ends: 143 [2018-10-01 00:06:12,852 INFO L226 Difference]: Without dead ends: 141 [2018-10-01 00:06:12,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-10-01 00:06:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-01 00:06:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-01 00:06:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-01 00:06:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-01 00:06:12,856 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-10-01 00:06:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:12,857 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-01 00:06:12,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-01 00:06:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-01 00:06:12,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-01 00:06:12,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:12,857 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-10-01 00:06:12,857 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:12,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:12,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1195940730, now seen corresponding path program 137 times [2018-10-01 00:06:12,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:12,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:12,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:12,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:12,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:20,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:20,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:20,804 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:20,963 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-10-01 00:06:20,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:20,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:21,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:21,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 140 [2018-10-01 00:06:21,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-10-01 00:06:21,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-10-01 00:06:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-10-01 00:06:21,043 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 141 states. [2018-10-01 00:06:21,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:21,644 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-10-01 00:06:21,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-10-01 00:06:21,645 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 140 [2018-10-01 00:06:21,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:21,645 INFO L225 Difference]: With dead ends: 144 [2018-10-01 00:06:21,645 INFO L226 Difference]: Without dead ends: 142 [2018-10-01 00:06:21,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-10-01 00:06:21,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-01 00:06:21,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-10-01 00:06:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-01 00:06:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-10-01 00:06:21,648 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-10-01 00:06:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:21,648 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-10-01 00:06:21,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-10-01 00:06:21,649 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-10-01 00:06:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-01 00:06:21,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:21,649 INFO L375 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-10-01 00:06:21,649 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:21,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:21,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1580539168, now seen corresponding path program 138 times [2018-10-01 00:06:21,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:21,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:21,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:21,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:21,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:29,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:29,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:29,814 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:29,965 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-10-01 00:06:29,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:29,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:30,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:30,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 141 [2018-10-01 00:06:30,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-01 00:06:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-01 00:06:30,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-10-01 00:06:30,033 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-10-01 00:06:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:30,572 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-01 00:06:30,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-10-01 00:06:30,572 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-10-01 00:06:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:30,573 INFO L225 Difference]: With dead ends: 145 [2018-10-01 00:06:30,573 INFO L226 Difference]: Without dead ends: 143 [2018-10-01 00:06:30,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-10-01 00:06:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-01 00:06:30,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-01 00:06:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-01 00:06:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-01 00:06:30,577 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-10-01 00:06:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:30,577 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-01 00:06:30,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-01 00:06:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-01 00:06:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-01 00:06:30,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:30,578 INFO L375 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-10-01 00:06:30,578 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:30,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:30,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1752070086, now seen corresponding path program 139 times [2018-10-01 00:06:30,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:30,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:30,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:30,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:30,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:38,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:38,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:39,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:39,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:39,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:39,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 142 [2018-10-01 00:06:39,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-10-01 00:06:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-10-01 00:06:39,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-10-01 00:06:39,146 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 143 states. [2018-10-01 00:06:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:39,651 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-10-01 00:06:39,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-10-01 00:06:39,652 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 142 [2018-10-01 00:06:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:39,652 INFO L225 Difference]: With dead ends: 146 [2018-10-01 00:06:39,653 INFO L226 Difference]: Without dead ends: 144 [2018-10-01 00:06:39,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-10-01 00:06:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-01 00:06:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-01 00:06:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-01 00:06:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-10-01 00:06:39,657 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-10-01 00:06:39,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:39,657 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-10-01 00:06:39,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-10-01 00:06:39,657 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-10-01 00:06:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-01 00:06:39,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:39,658 INFO L375 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-10-01 00:06:39,658 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:39,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:39,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1520406048, now seen corresponding path program 140 times [2018-10-01 00:06:39,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:39,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:39,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:39,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:39,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:48,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:48,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:48,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:48,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:48,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:48,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:48,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:48,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 143 [2018-10-01 00:06:48,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-01 00:06:48,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-01 00:06:48,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-10-01 00:06:48,376 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-10-01 00:06:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:48,953 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-01 00:06:48,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-10-01 00:06:48,953 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-10-01 00:06:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:48,954 INFO L225 Difference]: With dead ends: 147 [2018-10-01 00:06:48,954 INFO L226 Difference]: Without dead ends: 145 [2018-10-01 00:06:48,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-10-01 00:06:48,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-01 00:06:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-01 00:06:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-01 00:06:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-01 00:06:48,957 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-10-01 00:06:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:48,957 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-01 00:06:48,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-01 00:06:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-01 00:06:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-01 00:06:48,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:48,958 INFO L375 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-10-01 00:06:48,958 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:48,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:48,958 INFO L82 PathProgramCache]: Analyzing trace with hash 112048902, now seen corresponding path program 141 times [2018-10-01 00:06:48,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:48,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:48,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:48,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:48,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:57,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:57,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:57,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:57,466 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-10-01 00:06:57,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:57,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:57,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:57,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 144 [2018-10-01 00:06:57,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-10-01 00:06:57,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-10-01 00:06:57,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-10-01 00:06:57,536 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 145 states. [2018-10-01 00:06:57,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:57,938 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-01 00:06:57,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-01 00:06:57,938 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 144 [2018-10-01 00:06:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:57,939 INFO L225 Difference]: With dead ends: 148 [2018-10-01 00:06:57,939 INFO L226 Difference]: Without dead ends: 146 [2018-10-01 00:06:57,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-10-01 00:06:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-01 00:06:57,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-01 00:06:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-01 00:06:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-01 00:06:57,942 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-10-01 00:06:57,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:57,942 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-01 00:06:57,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-10-01 00:06:57,942 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-01 00:06:57,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-01 00:06:57,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:57,943 INFO L375 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-10-01 00:06:57,943 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:57,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash -821455200, now seen corresponding path program 142 times [2018-10-01 00:06:57,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:57,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:57,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:57,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:57,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:06,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:06,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:06,495 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:06,606 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:06,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:06,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:06,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:06,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 145 [2018-10-01 00:07:06,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-01 00:07:06,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-01 00:07:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-10-01 00:07:06,712 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-10-01 00:07:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:07,273 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-01 00:07:07,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-10-01 00:07:07,275 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-10-01 00:07:07,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:07,275 INFO L225 Difference]: With dead ends: 149 [2018-10-01 00:07:07,275 INFO L226 Difference]: Without dead ends: 147 [2018-10-01 00:07:07,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-10-01 00:07:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-01 00:07:07,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-01 00:07:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-01 00:07:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-01 00:07:07,279 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-10-01 00:07:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:07,280 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-01 00:07:07,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-01 00:07:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-01 00:07:07,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-01 00:07:07,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:07,280 INFO L375 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-10-01 00:07:07,281 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:07,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:07,281 INFO L82 PathProgramCache]: Analyzing trace with hash 304688710, now seen corresponding path program 143 times [2018-10-01 00:07:07,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:07,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:07,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:07,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:07,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:15,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:15,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:15,993 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:16,163 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-10-01 00:07:16,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:16,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:16,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:16,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 146 [2018-10-01 00:07:16,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-10-01 00:07:16,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-10-01 00:07:16,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-10-01 00:07:16,232 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 147 states. [2018-10-01 00:07:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:16,753 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-10-01 00:07:16,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-10-01 00:07:16,754 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 146 [2018-10-01 00:07:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:16,754 INFO L225 Difference]: With dead ends: 150 [2018-10-01 00:07:16,755 INFO L226 Difference]: Without dead ends: 148 [2018-10-01 00:07:16,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-10-01 00:07:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-01 00:07:16,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-10-01 00:07:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-01 00:07:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-01 00:07:16,759 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-10-01 00:07:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:16,759 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-01 00:07:16,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-10-01 00:07:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-01 00:07:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-01 00:07:16,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:16,760 INFO L375 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-10-01 00:07:16,760 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:16,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash 855411552, now seen corresponding path program 144 times [2018-10-01 00:07:16,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:16,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:16,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:16,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:16,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:25,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:25,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:25,650 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:25,814 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-01 00:07:25,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:25,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:25,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:25,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 147 [2018-10-01 00:07:25,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-10-01 00:07:25,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-10-01 00:07:25,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-10-01 00:07:25,895 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-10-01 00:07:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:26,563 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-01 00:07:26,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-10-01 00:07:26,563 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-10-01 00:07:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:26,564 INFO L225 Difference]: With dead ends: 151 [2018-10-01 00:07:26,564 INFO L226 Difference]: Without dead ends: 149 [2018-10-01 00:07:26,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-10-01 00:07:26,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-01 00:07:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-01 00:07:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-01 00:07:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-01 00:07:26,568 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-10-01 00:07:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:26,569 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-01 00:07:26,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-10-01 00:07:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-01 00:07:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-01 00:07:26,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:26,569 INFO L375 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-10-01 00:07:26,569 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:26,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash 747950470, now seen corresponding path program 145 times [2018-10-01 00:07:26,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:26,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:26,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:26,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:26,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:35,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:35,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:35,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:35,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:35,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:35,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 148 [2018-10-01 00:07:35,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-10-01 00:07:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-10-01 00:07:35,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-10-01 00:07:35,941 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 149 states. [2018-10-01 00:07:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:36,644 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-10-01 00:07:36,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-10-01 00:07:36,644 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 148 [2018-10-01 00:07:36,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:36,645 INFO L225 Difference]: With dead ends: 152 [2018-10-01 00:07:36,645 INFO L226 Difference]: Without dead ends: 150 [2018-10-01 00:07:36,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-10-01 00:07:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-01 00:07:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-01 00:07:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-01 00:07:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-10-01 00:07:36,649 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-10-01 00:07:36,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:36,649 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-10-01 00:07:36,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-10-01 00:07:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-10-01 00:07:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-01 00:07:36,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:36,649 INFO L375 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-10-01 00:07:36,650 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:36,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1711624224, now seen corresponding path program 146 times [2018-10-01 00:07:36,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:36,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:36,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:36,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:36,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:45,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:45,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:45,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:46,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:46,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:46,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:46,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:46,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 149 [2018-10-01 00:07:46,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-01 00:07:46,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-01 00:07:46,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-10-01 00:07:46,094 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-10-01 00:07:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:46,421 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-01 00:07:46,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-01 00:07:46,422 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-10-01 00:07:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:46,423 INFO L225 Difference]: With dead ends: 153 [2018-10-01 00:07:46,423 INFO L226 Difference]: Without dead ends: 151 [2018-10-01 00:07:46,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-10-01 00:07:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-01 00:07:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-01 00:07:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-01 00:07:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-01 00:07:46,427 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-10-01 00:07:46,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:46,427 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-01 00:07:46,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-01 00:07:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-01 00:07:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-01 00:07:46,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:46,428 INFO L375 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-10-01 00:07:46,428 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:46,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1520739526, now seen corresponding path program 147 times [2018-10-01 00:07:46,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:46,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:46,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:46,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:46,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:55,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:55,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:55,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:55,864 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-10-01 00:07:55,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:55,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:55,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:55,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 150 [2018-10-01 00:07:55,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-10-01 00:07:55,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-10-01 00:07:55,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-10-01 00:07:55,942 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 151 states. [2018-10-01 00:07:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:56,608 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-01 00:07:56,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-10-01 00:07:56,609 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 150 [2018-10-01 00:07:56,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:56,609 INFO L225 Difference]: With dead ends: 154 [2018-10-01 00:07:56,609 INFO L226 Difference]: Without dead ends: 152 [2018-10-01 00:07:56,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-10-01 00:07:56,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-01 00:07:56,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-10-01 00:07:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-01 00:07:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-01 00:07:56,614 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-10-01 00:07:56,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:56,614 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-01 00:07:56,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-10-01 00:07:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-01 00:07:56,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-01 00:07:56,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:56,615 INFO L375 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-10-01 00:07:56,615 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:56,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:56,615 INFO L82 PathProgramCache]: Analyzing trace with hash -101718816, now seen corresponding path program 148 times [2018-10-01 00:07:56,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:56,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:56,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:56,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:56,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:05,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:05,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:05,979 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:06,078 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:06,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:06,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:06,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:06,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 151 [2018-10-01 00:08:06,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-10-01 00:08:06,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-10-01 00:08:06,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-10-01 00:08:06,170 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-10-01 00:08:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:06,929 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-01 00:08:06,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-10-01 00:08:06,930 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-10-01 00:08:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:06,930 INFO L225 Difference]: With dead ends: 155 [2018-10-01 00:08:06,930 INFO L226 Difference]: Without dead ends: 153 [2018-10-01 00:08:06,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-10-01 00:08:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-01 00:08:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-01 00:08:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-01 00:08:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-01 00:08:06,934 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-10-01 00:08:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:06,934 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-01 00:08:06,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-10-01 00:08:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-01 00:08:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-01 00:08:06,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:06,934 INFO L375 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-10-01 00:08:06,934 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:06,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:06,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1141680134, now seen corresponding path program 149 times [2018-10-01 00:08:06,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:06,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:06,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:06,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:06,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:16,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:16,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:16,512 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:08:16,696 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2018-10-01 00:08:16,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:16,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:16,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:16,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 152 [2018-10-01 00:08:16,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-10-01 00:08:16,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-10-01 00:08:16,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-10-01 00:08:16,771 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 153 states. [2018-10-01 00:08:17,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:17,210 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-10-01 00:08:17,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-10-01 00:08:17,210 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 152 [2018-10-01 00:08:17,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:17,211 INFO L225 Difference]: With dead ends: 156 [2018-10-01 00:08:17,211 INFO L226 Difference]: Without dead ends: 154 [2018-10-01 00:08:17,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-10-01 00:08:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-01 00:08:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-10-01 00:08:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-01 00:08:17,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-10-01 00:08:17,216 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-10-01 00:08:17,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:17,217 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-10-01 00:08:17,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-10-01 00:08:17,217 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-10-01 00:08:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-01 00:08:17,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:17,218 INFO L375 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-10-01 00:08:17,218 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:17,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1032341920, now seen corresponding path program 150 times [2018-10-01 00:08:17,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:17,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:17,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:17,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:17,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:27,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:27,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:27,012 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:08:27,183 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2018-10-01 00:08:27,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:27,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:27,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:27,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 153 [2018-10-01 00:08:27,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-01 00:08:27,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-01 00:08:27,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-10-01 00:08:27,257 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-10-01 00:08:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:27,834 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-01 00:08:27,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-10-01 00:08:27,834 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-10-01 00:08:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:27,835 INFO L225 Difference]: With dead ends: 157 [2018-10-01 00:08:27,835 INFO L226 Difference]: Without dead ends: 155 [2018-10-01 00:08:27,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-10-01 00:08:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-01 00:08:27,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-01 00:08:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-01 00:08:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-01 00:08:27,839 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-10-01 00:08:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:27,840 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-01 00:08:27,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-01 00:08:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-01 00:08:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-01 00:08:27,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:27,840 INFO L375 BasicCegarLoop]: trace histogram [151, 1, 1, 1] [2018-10-01 00:08:27,840 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:27,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1937824582, now seen corresponding path program 151 times [2018-10-01 00:08:27,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:27,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:27,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:27,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:27,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:37,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:37,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:37,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:37,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:37,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:37,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 154 [2018-10-01 00:08:37,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-10-01 00:08:37,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-10-01 00:08:37,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-10-01 00:08:37,724 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 155 states. [2018-10-01 00:08:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:38,455 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-10-01 00:08:38,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-10-01 00:08:38,455 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 154 [2018-10-01 00:08:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:38,456 INFO L225 Difference]: With dead ends: 158 [2018-10-01 00:08:38,456 INFO L226 Difference]: Without dead ends: 156 [2018-10-01 00:08:38,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-10-01 00:08:38,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-01 00:08:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-01 00:08:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-01 00:08:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-01 00:08:38,461 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-10-01 00:08:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:38,461 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-01 00:08:38,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-10-01 00:08:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-01 00:08:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-01 00:08:38,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:38,461 INFO L375 BasicCegarLoop]: trace histogram [152, 1, 1, 1] [2018-10-01 00:08:38,462 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:38,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:38,462 INFO L82 PathProgramCache]: Analyzing trace with hash -56983968, now seen corresponding path program 152 times [2018-10-01 00:08:38,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:38,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:38,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:38,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:38,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:48,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:48,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:48,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:48,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:48,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:48,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:48,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:48,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154, 154] total 155 [2018-10-01 00:08:48,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-01 00:08:48,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-01 00:08:48,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-10-01 00:08:48,529 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-10-01 00:08:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:49,367 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-01 00:08:49,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-10-01 00:08:49,367 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-10-01 00:08:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:49,368 INFO L225 Difference]: With dead ends: 159 [2018-10-01 00:08:49,368 INFO L226 Difference]: Without dead ends: 157 [2018-10-01 00:08:49,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-10-01 00:08:49,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-01 00:08:49,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-01 00:08:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-01 00:08:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-01 00:08:49,373 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-10-01 00:08:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:49,373 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-01 00:08:49,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-01 00:08:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-01 00:08:49,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-01 00:08:49,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:49,374 INFO L375 BasicCegarLoop]: trace histogram [153, 1, 1, 1] [2018-10-01 00:08:49,374 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:49,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:49,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1766506874, now seen corresponding path program 153 times [2018-10-01 00:08:49,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:49,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:49,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:49,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:49,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:59,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:59,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:59,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:59,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-10-01 00:08:59,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:59,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:59,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:59,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 156 [2018-10-01 00:08:59,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-10-01 00:08:59,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-10-01 00:08:59,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-10-01 00:08:59,683 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 157 states. [2018-10-01 00:09:00,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:00,516 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-10-01 00:09:00,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-10-01 00:09:00,516 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 156 [2018-10-01 00:09:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:00,517 INFO L225 Difference]: With dead ends: 160 [2018-10-01 00:09:00,517 INFO L226 Difference]: Without dead ends: 158 [2018-10-01 00:09:00,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-10-01 00:09:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-01 00:09:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-10-01 00:09:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-01 00:09:00,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-01 00:09:00,521 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2018-10-01 00:09:00,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:00,521 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-01 00:09:00,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-10-01 00:09:00,521 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-01 00:09:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-01 00:09:00,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:00,522 INFO L375 BasicCegarLoop]: trace histogram [154, 1, 1, 1] [2018-10-01 00:09:00,522 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:00,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:00,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1072857888, now seen corresponding path program 154 times [2018-10-01 00:09:00,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:00,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:00,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:00,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:00,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:10,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:10,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:10,513 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:09:10,614 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:09:10,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:10,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:10,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:10,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 157 [2018-10-01 00:09:10,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-01 00:09:10,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-01 00:09:10,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-10-01 00:09:10,694 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-10-01 00:09:11,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:11,321 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-01 00:09:11,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-10-01 00:09:11,321 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-10-01 00:09:11,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:11,322 INFO L225 Difference]: With dead ends: 161 [2018-10-01 00:09:11,322 INFO L226 Difference]: Without dead ends: 159 [2018-10-01 00:09:11,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-10-01 00:09:11,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-01 00:09:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-01 00:09:11,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-01 00:09:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-01 00:09:11,326 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2018-10-01 00:09:11,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:11,326 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-01 00:09:11,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-01 00:09:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-01 00:09:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-01 00:09:11,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:11,327 INFO L375 BasicCegarLoop]: trace histogram [155, 1, 1, 1] [2018-10-01 00:09:11,327 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:11,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1101147706, now seen corresponding path program 155 times [2018-10-01 00:09:11,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:11,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:11,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:11,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:11,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:21,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:21,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:21,700 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:09:21,899 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-10-01 00:09:21,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:21,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:21,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:21,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157] total 158 [2018-10-01 00:09:21,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-10-01 00:09:21,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-10-01 00:09:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-10-01 00:09:21,976 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 159 states. [2018-10-01 00:09:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:22,495 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-10-01 00:09:22,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-10-01 00:09:22,495 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 158 [2018-10-01 00:09:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:22,496 INFO L225 Difference]: With dead ends: 162 [2018-10-01 00:09:22,496 INFO L226 Difference]: Without dead ends: 160 [2018-10-01 00:09:22,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-10-01 00:09:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-01 00:09:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-10-01 00:09:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-01 00:09:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-10-01 00:09:22,500 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2018-10-01 00:09:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:22,501 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-10-01 00:09:22,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-10-01 00:09:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-10-01 00:09:22,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-01 00:09:22,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:22,501 INFO L375 BasicCegarLoop]: trace histogram [156, 1, 1, 1] [2018-10-01 00:09:22,501 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:22,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:22,502 INFO L82 PathProgramCache]: Analyzing trace with hash 224155616, now seen corresponding path program 156 times [2018-10-01 00:09:22,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:22,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:22,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:22,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:22,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:32,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:32,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:32,894 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:09:33,077 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-01 00:09:33,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:33,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:33,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:33,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158, 158] total 159 [2018-10-01 00:09:33,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-10-01 00:09:33,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-10-01 00:09:33,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-10-01 00:09:33,156 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-10-01 00:09:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:33,605 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-01 00:09:33,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-10-01 00:09:33,605 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-10-01 00:09:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:33,606 INFO L225 Difference]: With dead ends: 163 [2018-10-01 00:09:33,606 INFO L226 Difference]: Without dead ends: 161 [2018-10-01 00:09:33,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-10-01 00:09:33,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-01 00:09:33,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-01 00:09:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-01 00:09:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-01 00:09:33,610 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2018-10-01 00:09:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:33,610 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-01 00:09:33,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-10-01 00:09:33,611 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-01 00:09:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-01 00:09:33,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:33,611 INFO L375 BasicCegarLoop]: trace histogram [157, 1, 1, 1] [2018-10-01 00:09:33,611 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:33,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:33,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1641114362, now seen corresponding path program 157 times [2018-10-01 00:09:33,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:33,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:33,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:33,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:33,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:44,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:44,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:44,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:44,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:44,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:44,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159] total 160 [2018-10-01 00:09:44,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-10-01 00:09:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-10-01 00:09:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-10-01 00:09:44,313 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 161 states. [2018-10-01 00:09:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:44,722 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-10-01 00:09:44,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-10-01 00:09:44,722 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 160 [2018-10-01 00:09:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:44,723 INFO L225 Difference]: With dead ends: 164 [2018-10-01 00:09:44,723 INFO L226 Difference]: Without dead ends: 162 [2018-10-01 00:09:44,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-10-01 00:09:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-01 00:09:44,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-01 00:09:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-01 00:09:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-10-01 00:09:44,728 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2018-10-01 00:09:44,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:44,728 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-10-01 00:09:44,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-10-01 00:09:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-10-01 00:09:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-01 00:09:44,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:44,728 INFO L375 BasicCegarLoop]: trace histogram [158, 1, 1, 1] [2018-10-01 00:09:44,729 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:44,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:44,729 INFO L82 PathProgramCache]: Analyzing trace with hash 665058464, now seen corresponding path program 158 times [2018-10-01 00:09:44,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:44,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:44,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:44,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:44,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:55,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:55,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:55,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:09:55,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:09:55,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:55,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:55,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:55,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160] total 161 [2018-10-01 00:09:55,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-01 00:09:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-01 00:09:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-10-01 00:09:55,551 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-10-01 00:09:55,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:55,995 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-01 00:09:55,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-10-01 00:09:55,995 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-10-01 00:09:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:55,996 INFO L225 Difference]: With dead ends: 165 [2018-10-01 00:09:55,996 INFO L226 Difference]: Without dead ends: 163 [2018-10-01 00:09:55,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-10-01 00:09:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-01 00:09:56,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-01 00:09:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-01 00:09:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-01 00:09:56,001 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2018-10-01 00:09:56,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:56,001 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-01 00:09:56,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-01 00:09:56,001 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-01 00:09:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-01 00:09:56,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:56,002 INFO L375 BasicCegarLoop]: trace histogram [159, 1, 1, 1] [2018-10-01 00:09:56,002 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:56,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash -858027962, now seen corresponding path program 159 times [2018-10-01 00:09:56,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:56,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:56,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:56,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:56,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:06,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:06,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:06,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:10:07,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2018-10-01 00:10:07,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:07,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:07,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:07,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161] total 162 [2018-10-01 00:10:07,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-10-01 00:10:07,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-10-01 00:10:07,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-10-01 00:10:07,165 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 163 states. [2018-10-01 00:10:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:07,653 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-10-01 00:10:07,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-10-01 00:10:07,653 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 162 [2018-10-01 00:10:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:07,654 INFO L225 Difference]: With dead ends: 166 [2018-10-01 00:10:07,654 INFO L226 Difference]: Without dead ends: 164 [2018-10-01 00:10:07,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-10-01 00:10:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-01 00:10:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-10-01 00:10:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-01 00:10:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-01 00:10:07,659 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2018-10-01 00:10:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:07,659 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-01 00:10:07,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-10-01 00:10:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-01 00:10:07,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-01 00:10:07,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:07,660 INFO L375 BasicCegarLoop]: trace histogram [160, 1, 1, 1] [2018-10-01 00:10:07,660 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:07,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:07,660 INFO L82 PathProgramCache]: Analyzing trace with hash -829066912, now seen corresponding path program 160 times [2018-10-01 00:10:07,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:07,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:07,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:07,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:07,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:18,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:18,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:18,527 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:10:18,638 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:10:18,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:18,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:18,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:18,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 162] total 163 [2018-10-01 00:10:18,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-10-01 00:10:18,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-10-01 00:10:18,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-10-01 00:10:18,721 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-10-01 00:10:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:19,340 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-01 00:10:19,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-10-01 00:10:19,340 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-10-01 00:10:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:19,341 INFO L225 Difference]: With dead ends: 167 [2018-10-01 00:10:19,341 INFO L226 Difference]: Without dead ends: 165 [2018-10-01 00:10:19,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-10-01 00:10:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-01 00:10:19,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-01 00:10:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-01 00:10:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-01 00:10:19,345 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 163 [2018-10-01 00:10:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:19,345 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-01 00:10:19,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-10-01 00:10:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-01 00:10:19,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-01 00:10:19,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:19,345 INFO L375 BasicCegarLoop]: trace histogram [161, 1, 1, 1] [2018-10-01 00:10:19,346 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:19,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:19,346 INFO L82 PathProgramCache]: Analyzing trace with hash 68725638, now seen corresponding path program 161 times [2018-10-01 00:10:19,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:19,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:19,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:19,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:19,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:30,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:30,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:30,282 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:10:30,490 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-10-01 00:10:30,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:30,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:30,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:30,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163] total 164 [2018-10-01 00:10:30,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-10-01 00:10:30,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-10-01 00:10:30,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-10-01 00:10:30,582 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 165 states. [2018-10-01 00:10:31,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:31,370 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-10-01 00:10:31,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-10-01 00:10:31,371 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 164 [2018-10-01 00:10:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:31,372 INFO L225 Difference]: With dead ends: 168 [2018-10-01 00:10:31,372 INFO L226 Difference]: Without dead ends: 166 [2018-10-01 00:10:31,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-10-01 00:10:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-01 00:10:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-01 00:10:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-01 00:10:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-10-01 00:10:31,376 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 164 [2018-10-01 00:10:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:31,376 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-10-01 00:10:31,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-10-01 00:10:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-10-01 00:10:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-01 00:10:31,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:31,377 INFO L375 BasicCegarLoop]: trace histogram [162, 1, 1, 1] [2018-10-01 00:10:31,378 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:31,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2130490912, now seen corresponding path program 162 times [2018-10-01 00:10:31,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:31,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:31,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:31,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:31,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:42,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:42,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:42,489 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:10:42,682 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2018-10-01 00:10:42,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:42,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:42,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:42,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 164] total 165 [2018-10-01 00:10:42,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-10-01 00:10:42,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-10-01 00:10:42,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-10-01 00:10:42,763 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 166 states. [2018-10-01 00:10:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:43,689 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-01 00:10:43,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-10-01 00:10:43,689 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 165 [2018-10-01 00:10:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:43,689 INFO L225 Difference]: With dead ends: 169 [2018-10-01 00:10:43,689 INFO L226 Difference]: Without dead ends: 167 [2018-10-01 00:10:43,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-10-01 00:10:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-01 00:10:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-01 00:10:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-01 00:10:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-01 00:10:43,693 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 165 [2018-10-01 00:10:43,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:43,693 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-01 00:10:43,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-10-01 00:10:43,693 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-01 00:10:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-01 00:10:43,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:43,693 INFO L375 BasicCegarLoop]: trace histogram [163, 1, 1, 1] [2018-10-01 00:10:43,694 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:43,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:43,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1620704966, now seen corresponding path program 163 times [2018-10-01 00:10:43,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:43,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:43,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:43,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:43,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:54,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:54,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:54,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:55,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:55,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:55,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 165] total 166 [2018-10-01 00:10:55,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-10-01 00:10:55,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-10-01 00:10:55,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-10-01 00:10:55,118 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 167 states. [2018-10-01 00:10:56,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:56,049 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-10-01 00:10:56,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-10-01 00:10:56,049 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 166 [2018-10-01 00:10:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:56,050 INFO L225 Difference]: With dead ends: 170 [2018-10-01 00:10:56,050 INFO L226 Difference]: Without dead ends: 168 [2018-10-01 00:10:56,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-10-01 00:10:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-01 00:10:56,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-10-01 00:10:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-01 00:10:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-10-01 00:10:56,053 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 166 [2018-10-01 00:10:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:56,054 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-10-01 00:10:56,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-10-01 00:10:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-10-01 00:10:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-01 00:10:56,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:56,054 INFO L375 BasicCegarLoop]: trace histogram [164, 1, 1, 1] [2018-10-01 00:10:56,054 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:56,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:56,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1297757472, now seen corresponding path program 164 times [2018-10-01 00:10:56,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:56,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:56,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:56,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:56,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:07,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:07,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:07,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:11:07,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:11:07,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:07,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:07,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:07,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166, 166] total 167 [2018-10-01 00:11:07,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-10-01 00:11:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-10-01 00:11:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-10-01 00:11:07,504 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 168 states. [2018-10-01 00:11:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:08,318 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-01 00:11:08,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-10-01 00:11:08,318 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 167 [2018-10-01 00:11:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:08,319 INFO L225 Difference]: With dead ends: 171 [2018-10-01 00:11:08,319 INFO L226 Difference]: Without dead ends: 169 [2018-10-01 00:11:08,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-10-01 00:11:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-01 00:11:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-01 00:11:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-01 00:11:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-01 00:11:08,323 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 167 [2018-10-01 00:11:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:08,324 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-01 00:11:08,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-10-01 00:11:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-01 00:11:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-01 00:11:08,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:08,324 INFO L375 BasicCegarLoop]: trace histogram [165, 1, 1, 1] [2018-10-01 00:11:08,324 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:08,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:08,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1575779834, now seen corresponding path program 165 times [2018-10-01 00:11:08,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:08,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:08,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:08,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:08,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:11:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:20,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:11:20,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:11:20,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:11:20,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2018-10-01 00:11:20,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:20,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:20,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:11:20,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 167] total 168 [2018-10-01 00:11:20,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-10-01 00:11:20,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-10-01 00:11:20,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-10-01 00:11:20,338 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 169 states. [2018-10-01 00:11:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:20,812 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-10-01 00:11:20,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-10-01 00:11:20,812 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 168 [2018-10-01 00:11:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:20,813 INFO L225 Difference]: With dead ends: 172 [2018-10-01 00:11:20,813 INFO L226 Difference]: Without dead ends: 170 [2018-10-01 00:11:20,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-10-01 00:11:20,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-01 00:11:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-10-01 00:11:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-01 00:11:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-10-01 00:11:20,818 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 168 [2018-10-01 00:11:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:20,818 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-10-01 00:11:20,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-10-01 00:11:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-10-01 00:11:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-01 00:11:20,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:20,818 INFO L375 BasicCegarLoop]: trace histogram [166, 1, 1, 1] [2018-10-01 00:11:20,819 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:11:20,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1604538464, now seen corresponding path program 166 times [2018-10-01 00:11:20,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:20,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:20,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:20,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:20,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-01 00:11:28,568 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:11:28,572 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:11:28,572 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:11:28 BoogieIcfgContainer [2018-10-01 00:11:28,572 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:11:28,573 INFO L168 Benchmark]: Toolchain (without parser) took 762581.91 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -153.1 MB). Free memory was 1.5 GB in the beginning and 708.8 MB in the end (delta: 767.3 MB). Peak memory consumption was 614.2 MB. Max. memory is 7.1 GB. [2018-10-01 00:11:28,574 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:11:28,575 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:11:28,575 INFO L168 Benchmark]: Boogie Preprocessor took 24.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:11:28,575 INFO L168 Benchmark]: RCFGBuilder took 284.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:11:28,576 INFO L168 Benchmark]: TraceAbstraction took 762218.00 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -153.1 MB). Free memory was 1.5 GB in the beginning and 708.8 MB in the end (delta: 746.2 MB). Peak memory consumption was 593.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:11:28,578 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 48.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 284.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 762218.00 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -153.1 MB). Free memory was 1.5 GB in the beginning and 708.8 MB in the end (delta: 746.2 MB). Peak memory consumption was 593.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 170 with TraceHistMax 166, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 139 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 762.1s OverallTime, 167 OverallIterations, 166 TraceHistogramMax, 50.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 500 SDtfs, 2 SDslu, 8102 SDs, 0 SdLazy, 22198 SolverSat, 273 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28052 GetRequests, 14026 SyntacticMatches, 0 SemanticMatches, 14026 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27060 ImplicationChecksByTransitivity, 668.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=166, 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: 0.5s AutomataMinimizationTime, 166 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 16.6s SatisfiabilityAnalysisTime, 677.4s InterpolantComputationTime, 28383 NumberOfCodeBlocks, 28383 NumberOfCodeBlocksAsserted, 3844 NumberOfCheckSat, 28052 ConstructedInterpolants, 0 QuantifiedInterpolants, 15496258 SizeOfPredicates, 330 NumberOfNonLiveVariables, 56265 ConjunctsInSsa, 14025 ConjunctsInUnsatCore, 331 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1524710 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-11-28-587.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-11-28-587.csv Completed graceful shutdown