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/Luxembourg-ArraysIntegefied.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:30:17,720 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:30:17,722 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:30:17,734 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:30:17,734 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:30:17,735 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:30:17,737 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:30:17,738 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:30:17,740 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:30:17,741 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:30:17,742 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:30:17,776 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-26 21:30:17,790 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:30:17,791 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:30:17,791 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:30:17,792 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:30:17,792 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:30:17,792 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:30:17,793 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:30:17,793 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:30:17,793 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:30:17,793 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:30:17,793 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:30:17,794 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:30:17,794 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:30:17,794 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:30:17,794 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:30:17,794 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:30:17,795 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:30:17,795 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:30:17,795 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:30:17,795 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:30:17,795 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:30:17,796 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:30:17,796 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:30:17,796 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:30:17,796 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:30:17,796 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:30:17,797 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:30:17,797 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:30:17,797 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:30:17,797 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:30:17,860 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:30:17,872 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:30:17,879 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:30:17,881 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:30:17,882 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:30:17,883 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl [2018-09-26 21:30:17,883 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl' [2018-09-26 21:30:17,931 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:30:17,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:30:17,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:30:17,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:30:17,935 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:30:17,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:17" (1/1) ... [2018-09-26 21:30:17,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:17" (1/1) ... [2018-09-26 21:30:17,975 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:30:17,975 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:30:17,975 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:30:17,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:30:17,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:30:17,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:30:17,979 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:30:17,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:17" (1/1) ... [2018-09-26 21:30:17,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:17" (1/1) ... [2018-09-26 21:30:17,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:17" (1/1) ... [2018-09-26 21:30:17,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:17" (1/1) ... [2018-09-26 21:30:17,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:17" (1/1) ... [2018-09-26 21:30:18,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:17" (1/1) ... [2018-09-26 21:30:18,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:17" (1/1) ... [2018-09-26 21:30:18,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:30:18,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:30:18,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:30:18,005 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:30:18,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:30:18,082 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-26 21:30:18,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-26 21:30:18,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-26 21:30:18,463 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:30:18,463 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:30:18 BoogieIcfgContainer [2018-09-26 21:30:18,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:30:18,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:30:18,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:30:18,467 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:30:18,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:17" (1/2) ... [2018-09-26 21:30:18,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c11fab and model type Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:30:18, skipping insertion in model container [2018-09-26 21:30:18,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:30:18" (2/2) ... [2018-09-26 21:30:18,471 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-ArraysIntegefied.bpl [2018-09-26 21:30:18,481 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:30:18,493 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:30:18,537 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:30:18,538 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:30:18,538 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:30:18,538 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:30:18,538 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:30:18,538 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:30:18,539 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:30:18,539 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:30:18,539 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:30:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-09-26 21:30:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:30:18,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:18,563 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:30:18,564 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:18,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:18,571 INFO L82 PathProgramCache]: Analyzing trace with hash 890493448, now seen corresponding path program 1 times [2018-09-26 21:30:18,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:18,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:18,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:18,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:18,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:18,752 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:30:18,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:30:18,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:30:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:30:18,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:30:18,783 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2018-09-26 21:30:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:18,865 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2018-09-26 21:30:18,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:30:18,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-09-26 21:30:18,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:18,883 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:30:18,883 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:30:18,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:30:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:30:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:30:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:30:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-26 21:30:18,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2018-09-26 21:30:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:18,933 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-26 21:30:18,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:30:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-26 21:30:18,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:30:18,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:18,933 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:30:18,934 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:18,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:18,934 INFO L82 PathProgramCache]: Analyzing trace with hash 892342412, now seen corresponding path program 1 times [2018-09-26 21:30:18,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:18,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:18,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:18,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:18,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:18,958 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:30:18,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:30:18,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:30:18,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:30:18,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:30:18,960 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 3 states. [2018-09-26 21:30:18,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:18,984 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:30:18,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:30:18,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-09-26 21:30:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:18,985 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:30:18,985 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:30:18,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:30:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:30:18,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:30:18,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:30:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:30:18,991 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2018-09-26 21:30:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:18,992 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:30:18,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:30:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:30:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:30:18,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:18,993 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:18,993 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:18,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:18,994 INFO L82 PathProgramCache]: Analyzing trace with hash -391235530, now seen corresponding path program 1 times [2018-09-26 21:30:18,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:18,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:18,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:18,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:18,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:19,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:19,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:19,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:19,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:19,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:19,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:30:19,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:30:19,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:30:19,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:30:19,171 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-09-26 21:30:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:19,243 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:30:19,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:30:19,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-09-26 21:30:19,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:19,245 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:30:19,245 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:30:19,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:30:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:30:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:30:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:30:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:30:19,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-09-26 21:30:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:19,250 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:30:19,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:30:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:30:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:30:19,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:19,251 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:19,251 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:19,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:19,252 INFO L82 PathProgramCache]: Analyzing trace with hash -602113312, now seen corresponding path program 2 times [2018-09-26 21:30:19,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:19,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:19,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:19,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:19,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:19,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:19,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:19,516 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:19,544 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:19,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:19,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:19,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:19,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:30:19,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:30:19,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:30:19,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:30:19,582 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-09-26 21:30:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:19,625 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:30:19,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:30:19,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-09-26 21:30:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:19,626 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:30:19,627 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:30:19,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:30:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:30:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:30:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:30:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:30:19,631 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-09-26 21:30:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:19,631 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:30:19,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:30:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:30:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:30:19,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:19,633 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:19,633 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:19,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:19,634 INFO L82 PathProgramCache]: Analyzing trace with hash 334846090, now seen corresponding path program 3 times [2018-09-26 21:30:19,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:19,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:19,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:19,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:19,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:19,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:19,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:19,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:19,817 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:30:19,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:19,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:19,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:19,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:30:19,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:30:19,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:30:19,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:19,851 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-09-26 21:30:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:19,879 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:30:19,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:30:19,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-09-26 21:30:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:19,881 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:30:19,882 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:30:19,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:30:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:30:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:30:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:30:19,887 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-09-26 21:30:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:19,887 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:30:19,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:30:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:30:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:30:19,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:19,889 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:19,889 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:19,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash -747417292, now seen corresponding path program 4 times [2018-09-26 21:30:19,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:19,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:19,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:19,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:19,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:20,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:20,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:20,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:20,226 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:20,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:20,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:20,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:20,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:20,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:20,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:20,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:20,272 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2018-09-26 21:30:20,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:20,303 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:30:20,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:20,305 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-09-26 21:30:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:20,306 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:30:20,306 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:30:20,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:30:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:30:20,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:30:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:30:20,313 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-09-26 21:30:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:20,313 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:30:20,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:30:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:30:20,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:20,315 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:20,315 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:20,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:20,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1016128734, now seen corresponding path program 5 times [2018-09-26 21:30:20,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:20,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:20,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:20,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:20,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:20,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:20,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:20,466 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:20,499 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:30:20,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:20,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:20,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:20,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:20,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:20,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:20,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:20,548 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2018-09-26 21:30:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:20,655 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:30:20,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:20,656 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-26 21:30:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:20,657 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:30:20,657 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:30:20,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:30:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:30:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:30:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:30:20,662 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-09-26 21:30:20,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:20,662 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:30:20,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:20,663 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:30:20,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:30:20,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:20,664 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:20,664 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:20,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:20,665 INFO L82 PathProgramCache]: Analyzing trace with hash -267873400, now seen corresponding path program 6 times [2018-09-26 21:30:20,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:20,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:20,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:20,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:20,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:20,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:20,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:20,859 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:20,881 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:30:20,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:20,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:20,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:20,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:30:20,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:30:20,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:30:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:30:20,920 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 9 states. [2018-09-26 21:30:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:20,946 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:30:20,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:30:20,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-09-26 21:30:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:20,948 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:30:20,949 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:30:20,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:30:20,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:30:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:30:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:30:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:30:20,955 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-09-26 21:30:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:20,955 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:30:20,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:30:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:30:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:30:20,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:20,957 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:20,957 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:20,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:20,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1386947278, now seen corresponding path program 7 times [2018-09-26 21:30:20,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:20,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:20,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:20,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:20,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:21,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:21,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:21,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:21,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:21,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:21,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:30:21,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:30:21,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:30:21,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:30:21,510 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 10 states. [2018-09-26 21:30:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:21,554 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:30:21,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:30:21,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-09-26 21:30:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:21,557 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:30:21,557 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:30:21,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:30:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:30:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:30:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:30:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:30:21,562 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-09-26 21:30:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:21,563 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:30:21,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:30:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:30:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:30:21,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:21,565 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:21,565 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:21,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash -223329828, now seen corresponding path program 8 times [2018-09-26 21:30:21,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:21,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:21,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:21,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:21,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:21,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:21,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:21,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:21,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:21,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:21,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:21,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:21,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:30:21,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:30:21,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:30:21,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:30:21,923 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 11 states. [2018-09-26 21:30:21,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:21,977 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:30:21,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:30:21,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-09-26 21:30:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:21,980 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:30:21,980 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:30:21,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:30:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:30:21,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:30:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:30:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:30:21,986 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-09-26 21:30:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:21,986 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:30:21,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:30:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:30:21,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:30:21,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:21,988 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:21,988 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:21,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:21,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1659551354, now seen corresponding path program 9 times [2018-09-26 21:30:21,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:21,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:21,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:21,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:21,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:22,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:22,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:22,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:22,218 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-26 21:30:22,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:22,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:22,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:22,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:30:22,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:30:22,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:30:22,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:30:22,266 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 12 states. [2018-09-26 21:30:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:22,540 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:30:22,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:30:22,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-09-26 21:30:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:22,541 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:30:22,541 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:30:22,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:30:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:30:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:30:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:30:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:30:22,550 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-09-26 21:30:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:22,550 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:30:22,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:30:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:30:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:30:22,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:22,558 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:22,559 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:22,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2009179088, now seen corresponding path program 10 times [2018-09-26 21:30:22,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:22,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:22,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:22,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:22,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:22,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:22,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:22,805 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:22,834 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:22,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:22,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:22,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:22,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:30:22,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:30:22,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:30:22,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:30:22,877 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 13 states. [2018-09-26 21:30:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:22,943 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:30:22,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:30:22,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-09-26 21:30:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:22,947 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:30:22,947 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:30:22,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:30:22,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:30:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:30:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:30:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:30:22,951 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-09-26 21:30:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:22,952 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:30:22,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:30:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:30:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:30:22,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:22,953 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:22,954 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:22,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:22,954 INFO L82 PathProgramCache]: Analyzing trace with hash 782635482, now seen corresponding path program 11 times [2018-09-26 21:30:22,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:22,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:22,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:22,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:22,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:23,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:23,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:23,180 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:23,197 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:30:23,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:23,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:23,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:23,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:30:23,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:30:23,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:30:23,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:30:23,241 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 14 states. [2018-09-26 21:30:23,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:23,291 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:30:23,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:30:23,291 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-09-26 21:30:23,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:23,292 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:30:23,292 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:30:23,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:30:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:30:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:30:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:30:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:30:23,297 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-09-26 21:30:23,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:23,297 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:30:23,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:30:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:30:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:30:23,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:23,299 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:23,299 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:23,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:23,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1233576580, now seen corresponding path program 12 times [2018-09-26 21:30:23,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:23,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:23,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:23,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:23,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:23,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:23,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:23,496 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:23,661 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:30:23,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:23,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:23,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:23,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:30:23,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:30:23,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:30:23,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:30:23,713 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 15 states. [2018-09-26 21:30:23,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:23,823 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:30:23,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:30:23,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-09-26 21:30:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:23,825 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:30:23,825 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:30:23,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:30:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:30:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:30:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:30:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:30:23,830 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-09-26 21:30:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:23,831 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:30:23,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:30:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:30:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:30:23,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:23,832 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:23,833 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:23,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:23,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1893420590, now seen corresponding path program 13 times [2018-09-26 21:30:23,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:23,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:23,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:23,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:23,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:24,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:24,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:24,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:24,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:24,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:24,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:30:24,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:30:24,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:30:24,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:30:24,190 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2018-09-26 21:30:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:24,233 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:30:24,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:30:24,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-09-26 21:30:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:24,234 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:30:24,234 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:30:24,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:30:24,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:30:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:30:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:30:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-26 21:30:24,240 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-09-26 21:30:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:24,240 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-26 21:30:24,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:30:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-26 21:30:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:30:24,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:24,242 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:24,242 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:24,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1151478568, now seen corresponding path program 14 times [2018-09-26 21:30:24,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:24,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:24,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:24,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:24,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:24,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:24,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:24,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:24,460 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:24,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:24,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:24,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:24,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:30:24,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:30:24,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:30:24,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:30:24,498 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 17 states. [2018-09-26 21:30:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:24,555 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:30:24,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:30:24,555 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-09-26 21:30:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:24,556 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:30:24,556 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:30:24,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:30:24,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:30:24,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:30:24,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:30:24,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-26 21:30:24,562 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-09-26 21:30:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:24,563 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-26 21:30:24,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:30:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-26 21:30:24,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:30:24,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:24,564 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:24,565 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:24,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:24,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1586034306, now seen corresponding path program 15 times [2018-09-26 21:30:24,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:24,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:24,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:24,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:24,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:24,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:24,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:24,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:24,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:30:24,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:24,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:24,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:24,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:30:24,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:30:24,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:30:24,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:30:24,871 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 18 states. [2018-09-26 21:30:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:24,903 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:30:24,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:30:24,904 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-09-26 21:30:24,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:24,905 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:30:24,906 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:30:24,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:30:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:30:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:30:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:30:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-26 21:30:24,912 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-09-26 21:30:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:24,913 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-26 21:30:24,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:30:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-26 21:30:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:30:24,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:24,914 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:24,914 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:24,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:24,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1318531884, now seen corresponding path program 16 times [2018-09-26 21:30:24,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:24,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:24,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:24,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:24,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:25,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:25,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:25,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:25,354 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:25,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:25,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:25,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:25,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:30:25,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:30:25,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:30:25,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:30:25,400 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 19 states. [2018-09-26 21:30:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:25,559 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:30:25,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:30:25,559 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-09-26 21:30:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:25,560 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:30:25,560 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:30:25,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:30:25,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:30:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:30:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:30:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-26 21:30:25,566 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-09-26 21:30:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:25,566 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-26 21:30:25,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:30:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-26 21:30:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:30:25,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:25,568 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:25,568 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:25,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:25,568 INFO L82 PathProgramCache]: Analyzing trace with hash -561837354, now seen corresponding path program 17 times [2018-09-26 21:30:25,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:25,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:25,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:25,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:25,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:26,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:26,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:26,139 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:26,170 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:30:26,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:26,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:26,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:26,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:30:26,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:30:26,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:30:26,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:30:26,223 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 20 states. [2018-09-26 21:30:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:26,302 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:30:26,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:30:26,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-09-26 21:30:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:26,303 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:30:26,303 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:30:26,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:30:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:30:26,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:30:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:30:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-26 21:30:26,307 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-09-26 21:30:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:26,307 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-26 21:30:26,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:30:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-26 21:30:26,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:30:26,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:26,308 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:26,309 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:26,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:26,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1611070848, now seen corresponding path program 18 times [2018-09-26 21:30:26,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:26,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:26,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:26,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:26,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:26,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:26,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:26,600 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:26,622 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:30:26,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:26,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:26,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:26,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:30:26,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:30:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:30:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:30:26,670 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 21 states. [2018-09-26 21:30:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:26,725 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-26 21:30:26,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:30:26,726 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-09-26 21:30:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:26,726 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:30:26,726 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:30:26,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:30:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:30:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:30:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:30:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-26 21:30:26,730 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-09-26 21:30:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:26,731 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-26 21:30:26,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:30:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-26 21:30:26,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:30:26,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:26,732 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:26,732 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:26,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:26,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1013085398, now seen corresponding path program 19 times [2018-09-26 21:30:26,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:26,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:26,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:26,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:26,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:27,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:27,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:27,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:27,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:27,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:27,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:30:27,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:30:27,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:30:27,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:30:27,157 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 22 states. [2018-09-26 21:30:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:27,235 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-26 21:30:27,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:30:27,235 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-09-26 21:30:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:27,236 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:30:27,237 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:30:27,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:30:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:30:27,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-26 21:30:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:30:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-26 21:30:27,241 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-09-26 21:30:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:27,241 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-26 21:30:27,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:30:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-26 21:30:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:30:27,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:27,242 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:27,243 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:27,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:27,243 INFO L82 PathProgramCache]: Analyzing trace with hash 947991508, now seen corresponding path program 20 times [2018-09-26 21:30:27,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:27,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:27,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:27,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:27,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:27,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:27,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:27,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:27,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:27,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:27,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:27,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:27,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:30:27,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:30:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:30:27,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:30:27,721 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 23 states. [2018-09-26 21:30:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:27,849 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-26 21:30:27,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:30:27,852 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-09-26 21:30:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:27,853 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:30:27,853 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:30:27,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:30:27,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:30:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:30:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:30:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-26 21:30:27,856 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-09-26 21:30:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:27,856 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-26 21:30:27,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:30:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-26 21:30:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:30:27,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:27,858 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:27,858 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:27,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:27,859 INFO L82 PathProgramCache]: Analyzing trace with hash -861112450, now seen corresponding path program 21 times [2018-09-26 21:30:27,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:27,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:27,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:27,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:27,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:28,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:28,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:28,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:28,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-26 21:30:28,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:28,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:28,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:28,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:30:28,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:30:28,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:30:28,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:30:28,589 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 24 states. [2018-09-26 21:30:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:28,695 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-26 21:30:28,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:30:28,696 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-09-26 21:30:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:28,697 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:30:28,697 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:30:28,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:30:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:30:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:30:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:30:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-26 21:30:28,701 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-09-26 21:30:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:28,702 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-26 21:30:28,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:30:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-26 21:30:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:30:28,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:28,702 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:28,703 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:28,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:28,703 INFO L82 PathProgramCache]: Analyzing trace with hash 215602728, now seen corresponding path program 22 times [2018-09-26 21:30:28,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:28,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:28,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:28,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:28,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:29,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:29,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:29,238 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:29,259 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:29,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:29,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:29,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:29,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:30:29,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:30:29,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:30:29,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:30:29,302 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 25 states. [2018-09-26 21:30:29,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:29,340 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-26 21:30:29,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:30:29,340 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-09-26 21:30:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:29,341 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:30:29,342 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:30:29,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:30:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:30:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:30:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:30:29,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-26 21:30:29,345 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-09-26 21:30:29,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:29,346 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-26 21:30:29,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:30:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-26 21:30:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:30:29,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:29,347 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:29,347 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:29,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1534865454, now seen corresponding path program 23 times [2018-09-26 21:30:29,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:29,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:29,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:29,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:29,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:29,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:29,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:29,689 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:29,716 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-26 21:30:29,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:29,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:29,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:29,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:30:29,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:30:29,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:30:29,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:30:29,762 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 26 states. [2018-09-26 21:30:29,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:29,808 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-26 21:30:29,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:30:29,808 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-09-26 21:30:29,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:29,809 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:30:29,809 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:30:29,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:30:29,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:30:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 21:30:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:30:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-26 21:30:29,812 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-09-26 21:30:29,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:29,812 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-26 21:30:29,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:30:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-26 21:30:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:30:29,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:29,813 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:29,814 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:29,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:29,814 INFO L82 PathProgramCache]: Analyzing trace with hash -35330948, now seen corresponding path program 24 times [2018-09-26 21:30:29,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:29,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:29,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:29,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:29,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:31,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:31,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:31,098 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:31,172 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:30:31,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:31,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:31,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:31,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:30:31,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:30:31,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:30:31,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:30:31,215 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 27 states. [2018-09-26 21:30:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:31,279 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-26 21:30:31,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:30:31,279 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-09-26 21:30:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:31,280 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:30:31,280 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:30:31,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:30:31,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:30:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 21:30:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:30:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-26 21:30:31,283 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-09-26 21:30:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:31,284 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-26 21:30:31,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:30:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-26 21:30:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:30:31,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:31,285 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:31,285 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:31,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:31,285 INFO L82 PathProgramCache]: Analyzing trace with hash -503868378, now seen corresponding path program 25 times [2018-09-26 21:30:31,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:31,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:31,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:31,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:31,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:32,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:32,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:32,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:32,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:32,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:32,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:30:32,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:30:32,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:30:32,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:30:32,131 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 28 states. [2018-09-26 21:30:32,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:32,180 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-26 21:30:32,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:30:32,181 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-09-26 21:30:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:32,182 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:30:32,182 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:30:32,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:30:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:30:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 21:30:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:30:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-26 21:30:32,186 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-09-26 21:30:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:32,186 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-26 21:30:32,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:30:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-26 21:30:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:30:32,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:32,187 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:32,187 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:32,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:32,188 INFO L82 PathProgramCache]: Analyzing trace with hash 410410704, now seen corresponding path program 26 times [2018-09-26 21:30:32,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:32,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:32,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:32,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:32,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:33,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:33,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:33,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:33,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:33,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:33,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:33,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:33,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:30:33,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:30:33,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:30:33,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:30:33,265 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 29 states. [2018-09-26 21:30:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:33,397 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-26 21:30:33,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:30:33,398 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-09-26 21:30:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:33,399 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:30:33,399 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:30:33,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:30:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:30:33,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:30:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:30:33,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-26 21:30:33,404 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-09-26 21:30:33,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:33,404 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-26 21:30:33,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:30:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-26 21:30:33,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:30:33,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:33,405 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:33,405 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:33,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash 131843194, now seen corresponding path program 27 times [2018-09-26 21:30:33,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:33,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:33,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:33,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:33,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:34,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:34,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:34,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:34,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:30:34,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:34,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:34,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:34,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:30:34,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:30:34,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:30:34,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:30:34,662 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 30 states. [2018-09-26 21:30:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:34,728 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-26 21:30:34,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:30:34,729 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-09-26 21:30:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:34,730 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:30:34,730 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:30:34,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:30:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:30:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-26 21:30:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:30:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-26 21:30:34,734 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-09-26 21:30:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:34,735 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-26 21:30:34,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:30:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-26 21:30:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:30:34,735 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:34,736 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:34,736 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:34,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:34,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1432503588, now seen corresponding path program 28 times [2018-09-26 21:30:34,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:34,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:34,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:34,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:34,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:35,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:35,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:35,322 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:35,346 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:35,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:35,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:35,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:35,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:30:35,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:30:35,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:30:35,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:30:35,394 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 31 states. [2018-09-26 21:30:35,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:35,488 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-26 21:30:35,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:30:35,488 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-09-26 21:30:35,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:35,490 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:30:35,490 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:30:35,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:30:35,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:30:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-26 21:30:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:30:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-26 21:30:35,494 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-09-26 21:30:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:35,494 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-26 21:30:35,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:30:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-26 21:30:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:30:35,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:35,495 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:35,495 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:35,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2063310642, now seen corresponding path program 29 times [2018-09-26 21:30:35,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:35,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:35,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:35,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:35,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:35,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:35,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:35,962 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:35,998 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-26 21:30:35,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:36,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:36,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:36,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:30:36,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:30:36,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:30:36,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:30:36,044 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 32 states. [2018-09-26 21:30:36,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:36,176 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-26 21:30:36,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:30:36,177 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-09-26 21:30:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:36,178 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:30:36,178 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:30:36,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:30:36,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:30:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-26 21:30:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:30:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-26 21:30:36,181 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-09-26 21:30:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:36,181 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-26 21:30:36,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:30:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-26 21:30:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 21:30:36,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:36,182 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:36,182 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:36,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1719888008, now seen corresponding path program 30 times [2018-09-26 21:30:36,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:36,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:36,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:36,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:36,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:36,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:36,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:36,788 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:36,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:30:36,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:36,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:36,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:36,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:30:36,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:30:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:30:36,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:30:36,880 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 33 states. [2018-09-26 21:30:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:36,965 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-26 21:30:36,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:30:36,965 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-09-26 21:30:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:36,966 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:30:36,966 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:30:36,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:30:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:30:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:30:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:30:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-26 21:30:36,970 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-09-26 21:30:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:36,970 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-26 21:30:36,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:30:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-26 21:30:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:30:36,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:36,971 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:36,971 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:36,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:36,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1270519518, now seen corresponding path program 31 times [2018-09-26 21:30:36,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:36,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:36,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:36,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:36,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:37,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:37,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:37,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:37,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:37,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:37,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:30:37,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:30:37,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:30:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:30:37,843 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 34 states. [2018-09-26 21:30:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:37,906 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-26 21:30:37,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:30:37,906 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-09-26 21:30:37,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:37,908 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:30:37,908 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:30:37,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:30:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:30:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-26 21:30:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:30:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-26 21:30:37,913 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-09-26 21:30:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:37,914 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-26 21:30:37,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:30:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-26 21:30:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:30:37,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:37,915 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:37,915 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:37,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:37,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1248242228, now seen corresponding path program 32 times [2018-09-26 21:30:37,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:37,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:37,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:37,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:37,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:38,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:38,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:38,488 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:38,515 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:38,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:38,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:38,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:38,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:30:38,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:30:38,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:30:38,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:30:38,561 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 35 states. [2018-09-26 21:30:38,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:38,665 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-26 21:30:38,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:30:38,665 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-09-26 21:30:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:38,666 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:30:38,667 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:30:38,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:30:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:30:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-26 21:30:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:30:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-26 21:30:38,670 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-09-26 21:30:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:38,671 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-26 21:30:38,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:30:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-26 21:30:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:30:38,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:38,671 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:38,672 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:38,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:38,672 INFO L82 PathProgramCache]: Analyzing trace with hash -596451978, now seen corresponding path program 33 times [2018-09-26 21:30:38,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:38,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:38,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:38,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:38,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:39,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:39,222 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 [2018-09-26 21:30:39,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:39,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-26 21:30:39,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:39,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:39,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:39,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:30:39,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:30:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:30:39,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:30:39,317 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 36 states. [2018-09-26 21:30:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:39,392 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-26 21:30:39,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:30:39,393 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-09-26 21:30:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:39,394 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:30:39,394 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:30:39,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:30:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:30:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-26 21:30:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-26 21:30:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-26 21:30:39,398 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-09-26 21:30:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:39,398 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-26 21:30:39,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:30:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-26 21:30:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-26 21:30:39,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:39,400 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:39,400 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:39,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:39,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1720483872, now seen corresponding path program 34 times [2018-09-26 21:30:39,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:39,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:39,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:39,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:39,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:40,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:40,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:40,150 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:40,180 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:40,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:40,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:40,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:40,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:30:40,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:30:40,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:30:40,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:30:40,240 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 37 states. [2018-09-26 21:30:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:40,315 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-26 21:30:40,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:30:40,315 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-09-26 21:30:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:40,317 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:30:40,317 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:30:40,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:30:40,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:30:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-26 21:30:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-26 21:30:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-26 21:30:40,323 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-09-26 21:30:40,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:40,323 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-26 21:30:40,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:30:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-26 21:30:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:30:40,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:40,324 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:40,325 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:40,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash 811646410, now seen corresponding path program 35 times [2018-09-26 21:30:40,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:40,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:40,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:40,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:40,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:41,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:41,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:41,214 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:41,362 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-26 21:30:41,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:41,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:41,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:41,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:30:41,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:30:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:30:41,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:30:41,416 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 38 states. [2018-09-26 21:30:41,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:41,595 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-26 21:30:41,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:30:41,595 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-09-26 21:30:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:41,596 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:30:41,597 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:30:41,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:30:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:30:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-26 21:30:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:30:41,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-26 21:30:41,600 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-09-26 21:30:41,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:41,601 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-26 21:30:41,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:30:41,601 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-26 21:30:41,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-26 21:30:41,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:41,602 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:41,602 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:41,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:41,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1428821620, now seen corresponding path program 36 times [2018-09-26 21:30:41,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:41,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:41,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:41,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:41,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:42,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:42,277 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 [2018-09-26 21:30:42,285 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:42,327 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:30:42,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:42,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:42,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:42,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:30:42,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:30:42,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:30:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:30:42,379 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 39 states. [2018-09-26 21:30:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:42,451 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-26 21:30:42,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:30:42,451 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-09-26 21:30:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:42,453 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:30:42,453 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:30:42,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:30:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:30:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-26 21:30:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:30:42,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-26 21:30:42,457 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-09-26 21:30:42,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:42,458 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-26 21:30:42,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:30:42,458 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-26 21:30:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-26 21:30:42,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:42,459 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:42,459 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:42,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:42,459 INFO L82 PathProgramCache]: Analyzing trace with hash -823981538, now seen corresponding path program 37 times [2018-09-26 21:30:42,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:42,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:42,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:42,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:42,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:43,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:43,578 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 [2018-09-26 21:30:43,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:43,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:43,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:43,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:30:43,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:30:43,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:30:43,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:30:43,681 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 40 states. [2018-09-26 21:30:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:44,173 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-26 21:30:44,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:30:44,174 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-09-26 21:30:44,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:44,175 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:30:44,175 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:30:44,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:30:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:30:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-26 21:30:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-26 21:30:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-26 21:30:44,180 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 154 [2018-09-26 21:30:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:44,181 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-26 21:30:44,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:30:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-26 21:30:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:30:44,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:44,182 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:44,182 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:44,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:44,182 INFO L82 PathProgramCache]: Analyzing trace with hash 373692616, now seen corresponding path program 38 times [2018-09-26 21:30:44,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:44,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:44,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:44,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:44,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:45,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:45,040 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 [2018-09-26 21:30:45,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:45,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:45,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:45,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:45,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:45,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:30:45,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:30:45,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:30:45,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:30:45,162 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 41 states. [2018-09-26 21:30:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:46,036 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-26 21:30:46,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:30:46,036 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-09-26 21:30:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:46,037 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:30:46,037 INFO L226 Difference]: Without dead ends: 163 [2018-09-26 21:30:46,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:30:46,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-26 21:30:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-26 21:30:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-26 21:30:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-26 21:30:46,042 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 158 [2018-09-26 21:30:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:46,043 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-26 21:30:46,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:30:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-26 21:30:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-26 21:30:46,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:46,044 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:46,044 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:46,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:46,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1026702734, now seen corresponding path program 39 times [2018-09-26 21:30:46,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:46,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:46,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:46,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:46,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:47,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:47,540 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 [2018-09-26 21:30:47,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:47,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-26 21:30:47,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:47,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:47,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:47,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:30:47,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:30:47,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:30:47,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:30:47,671 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 42 states. [2018-09-26 21:30:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:47,757 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-26 21:30:47,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:30:47,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-09-26 21:30:47,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:47,759 INFO L225 Difference]: With dead ends: 169 [2018-09-26 21:30:47,760 INFO L226 Difference]: Without dead ends: 167 [2018-09-26 21:30:47,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:30:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-26 21:30:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-26 21:30:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-26 21:30:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-26 21:30:47,764 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 162 [2018-09-26 21:30:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:47,764 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-26 21:30:47,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:30:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-26 21:30:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-26 21:30:47,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:47,766 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:47,766 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:47,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash 716474140, now seen corresponding path program 40 times [2018-09-26 21:30:47,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:47,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:47,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:47,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:47,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:48,569 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 [2018-09-26 21:30:48,576 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:48,610 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:48,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:48,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:48,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:30:48,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:30:48,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:30:48,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:30:48,658 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 43 states. [2018-09-26 21:30:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:48,787 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-26 21:30:48,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:30:48,788 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-09-26 21:30:48,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:48,789 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:30:48,789 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:30:48,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:30:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:30:48,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-26 21:30:48,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-26 21:30:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-26 21:30:48,796 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 166 [2018-09-26 21:30:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:48,797 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-26 21:30:48,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:30:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-26 21:30:48,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-26 21:30:48,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:48,798 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:48,798 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:48,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:48,799 INFO L82 PathProgramCache]: Analyzing trace with hash 49604294, now seen corresponding path program 41 times [2018-09-26 21:30:48,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:48,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:48,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:48,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:49,587 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 [2018-09-26 21:30:49,595 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:49,655 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-26 21:30:49,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:49,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:49,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:30:49,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:30:49,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:30:49,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:30:49,728 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 44 states. [2018-09-26 21:30:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:50,183 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-26 21:30:50,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:30:50,184 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-09-26 21:30:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:50,185 INFO L225 Difference]: With dead ends: 177 [2018-09-26 21:30:50,185 INFO L226 Difference]: Without dead ends: 175 [2018-09-26 21:30:50,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:30:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-26 21:30:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-26 21:30:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-26 21:30:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-26 21:30:50,189 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 170 [2018-09-26 21:30:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:50,190 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-26 21:30:50,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:30:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-26 21:30:50,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-26 21:30:50,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:50,191 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:50,191 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:50,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:50,192 INFO L82 PathProgramCache]: Analyzing trace with hash -11968144, now seen corresponding path program 42 times [2018-09-26 21:30:50,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:50,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:50,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:50,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:51,194 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 [2018-09-26 21:30:51,204 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:51,258 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:30:51,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:51,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:51,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:30:51,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:30:51,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:30:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:30:51,346 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 45 states. [2018-09-26 21:30:51,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:51,542 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-26 21:30:51,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:30:51,543 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-09-26 21:30:51,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:51,543 INFO L225 Difference]: With dead ends: 181 [2018-09-26 21:30:51,543 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:30:51,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:30:51,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:30:51,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-26 21:30:51,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-26 21:30:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-26 21:30:51,549 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 174 [2018-09-26 21:30:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:51,549 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-26 21:30:51,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:30:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-26 21:30:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:30:51,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:51,550 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:51,551 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:51,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:51,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1915516698, now seen corresponding path program 43 times [2018-09-26 21:30:51,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:51,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:51,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:51,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:52,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:52,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:52,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:52,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:52,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:52,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:30:52,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:30:52,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:30:52,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:30:52,618 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 46 states. [2018-09-26 21:30:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:52,930 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-26 21:30:52,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:30:52,930 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-09-26 21:30:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:52,931 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:30:52,932 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:30:52,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:30:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:30:52,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-26 21:30:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-26 21:30:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-26 21:30:52,936 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 178 [2018-09-26 21:30:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:52,937 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-26 21:30:52,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:30:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-26 21:30:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:30:52,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:52,938 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:52,938 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:52,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:52,938 INFO L82 PathProgramCache]: Analyzing trace with hash -321345596, now seen corresponding path program 44 times [2018-09-26 21:30:52,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:52,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:52,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:52,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:53,856 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 [2018-09-26 21:30:53,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:53,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:53,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:53,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:53,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:30:53,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:30:53,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:30:53,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:30:53,963 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 47 states. [2018-09-26 21:30:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:54,051 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-26 21:30:54,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:30:54,052 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-09-26 21:30:54,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:54,054 INFO L225 Difference]: With dead ends: 189 [2018-09-26 21:30:54,054 INFO L226 Difference]: Without dead ends: 187 [2018-09-26 21:30:54,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:30:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-26 21:30:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-26 21:30:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-26 21:30:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-26 21:30:54,058 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 182 [2018-09-26 21:30:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:54,058 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-26 21:30:54,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:30:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-26 21:30:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-26 21:30:54,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:54,059 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:54,060 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:54,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:54,060 INFO L82 PathProgramCache]: Analyzing trace with hash -548899986, now seen corresponding path program 45 times [2018-09-26 21:30:54,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:54,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:54,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:54,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:55,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:55,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:55,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-26 21:30:55,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:55,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:55,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:30:55,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:30:55,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:30:55,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:30:55,236 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 48 states. [2018-09-26 21:30:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:55,353 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-26 21:30:55,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:30:55,354 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-09-26 21:30:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:55,355 INFO L225 Difference]: With dead ends: 193 [2018-09-26 21:30:55,355 INFO L226 Difference]: Without dead ends: 191 [2018-09-26 21:30:55,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:30:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-26 21:30:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-26 21:30:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-26 21:30:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-26 21:30:55,360 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 186 [2018-09-26 21:30:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:55,360 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-26 21:30:55,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:30:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-26 21:30:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-26 21:30:55,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:55,362 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:55,362 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:55,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash 943086104, now seen corresponding path program 46 times [2018-09-26 21:30:55,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:55,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:55,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:55,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:56,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:56,497 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 [2018-09-26 21:30:56,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:56,544 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:56,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:56,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:56,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:56,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:30:56,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:30:56,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:30:56,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:30:56,629 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 49 states. [2018-09-26 21:30:56,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:56,897 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-26 21:30:56,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:30:56,897 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-09-26 21:30:56,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:56,898 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:30:56,898 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:30:56,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:30:56,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:30:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-26 21:30:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-26 21:30:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-26 21:30:56,902 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 190 [2018-09-26 21:30:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:56,902 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-26 21:30:56,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:30:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-26 21:30:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-26 21:30:56,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:56,903 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:56,903 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:56,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:56,903 INFO L82 PathProgramCache]: Analyzing trace with hash 85777346, now seen corresponding path program 47 times [2018-09-26 21:30:56,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:56,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:56,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:56,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:58,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:58,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:58,925 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:59,031 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-26 21:30:59,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:59,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:59,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:30:59,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:30:59,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:30:59,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:30:59,115 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 50 states. [2018-09-26 21:30:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:59,396 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-26 21:30:59,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:30:59,396 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-09-26 21:30:59,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:59,398 INFO L225 Difference]: With dead ends: 201 [2018-09-26 21:30:59,398 INFO L226 Difference]: Without dead ends: 199 [2018-09-26 21:30:59,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:30:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-26 21:30:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-26 21:30:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-26 21:30:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-26 21:30:59,401 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 194 [2018-09-26 21:30:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:59,402 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-26 21:30:59,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:30:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-26 21:30:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-26 21:30:59,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:59,403 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-09-26 21:30:59,403 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:59,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:59,404 INFO L82 PathProgramCache]: Analyzing trace with hash 305559660, now seen corresponding path program 48 times [2018-09-26 21:30:59,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:59,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:59,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:59,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:02,866 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 [2018-09-26 21:31:02,874 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:02,945 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:31:02,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:02,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:03,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:31:03,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:31:03,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:31:03,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:31:03,009 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 51 states. [2018-09-26 21:31:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:03,112 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-26 21:31:03,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:31:03,113 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-09-26 21:31:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:03,114 INFO L225 Difference]: With dead ends: 205 [2018-09-26 21:31:03,114 INFO L226 Difference]: Without dead ends: 203 [2018-09-26 21:31:03,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:31:03,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-26 21:31:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-26 21:31:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-26 21:31:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-26 21:31:03,118 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 198 [2018-09-26 21:31:03,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:03,119 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-26 21:31:03,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:31:03,119 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-26 21:31:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-26 21:31:03,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:03,120 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:03,120 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:03,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:03,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1971474410, now seen corresponding path program 49 times [2018-09-26 21:31:03,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:03,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:03,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:03,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:05,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:05,385 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 [2018-09-26 21:31:05,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:05,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:05,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:05,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:31:05,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:31:05,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:31:05,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:31:05,517 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 52 states. [2018-09-26 21:31:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:05,656 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-26 21:31:05,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:31:05,656 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-09-26 21:31:05,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:05,658 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:31:05,659 INFO L226 Difference]: Without dead ends: 207 [2018-09-26 21:31:05,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:31:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-26 21:31:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-26 21:31:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-26 21:31:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-26 21:31:05,662 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 202 [2018-09-26 21:31:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:05,663 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-26 21:31:05,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:31:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-26 21:31:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-26 21:31:05,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:05,664 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:05,664 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:05,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:05,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1750269248, now seen corresponding path program 50 times [2018-09-26 21:31:05,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:05,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:05,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:05,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:05,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:06,937 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 [2018-09-26 21:31:06,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:06,994 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:06,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:06,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:07,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:07,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:31:07,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:31:07,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:31:07,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:31:07,087 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 53 states. [2018-09-26 21:31:07,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:07,549 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-26 21:31:07,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:31:07,550 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-09-26 21:31:07,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:07,552 INFO L225 Difference]: With dead ends: 213 [2018-09-26 21:31:07,552 INFO L226 Difference]: Without dead ends: 211 [2018-09-26 21:31:07,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:31:07,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-26 21:31:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-26 21:31:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-26 21:31:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-26 21:31:07,557 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 206 [2018-09-26 21:31:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:07,557 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-26 21:31:07,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:31:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-26 21:31:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-26 21:31:07,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:07,558 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:07,559 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:07,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:07,559 INFO L82 PathProgramCache]: Analyzing trace with hash 37679210, now seen corresponding path program 51 times [2018-09-26 21:31:07,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:07,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:07,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:07,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:07,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:08,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:08,768 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 [2018-09-26 21:31:08,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:08,847 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-26 21:31:08,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:08,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:08,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:08,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:31:08,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:31:08,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:31:08,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:31:08,932 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 54 states. [2018-09-26 21:31:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:09,851 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-26 21:31:09,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:31:09,852 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-09-26 21:31:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:09,853 INFO L225 Difference]: With dead ends: 217 [2018-09-26 21:31:09,853 INFO L226 Difference]: Without dead ends: 215 [2018-09-26 21:31:09,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:31:09,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-26 21:31:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-26 21:31:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-26 21:31:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-26 21:31:09,858 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 210 [2018-09-26 21:31:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:09,859 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-26 21:31:09,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:31:09,859 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-26 21:31:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-26 21:31:09,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:09,860 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:09,860 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:09,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:09,861 INFO L82 PathProgramCache]: Analyzing trace with hash -781321964, now seen corresponding path program 52 times [2018-09-26 21:31:09,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:09,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:09,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:09,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:12,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:12,535 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 [2018-09-26 21:31:12,543 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:12,583 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:12,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:12,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:12,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:12,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:31:12,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:31:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:31:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:31:12,671 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 55 states. [2018-09-26 21:31:12,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:12,924 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-26 21:31:12,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:31:12,924 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-09-26 21:31:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:12,926 INFO L225 Difference]: With dead ends: 221 [2018-09-26 21:31:12,926 INFO L226 Difference]: Without dead ends: 219 [2018-09-26 21:31:12,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:31:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-26 21:31:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-26 21:31:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-26 21:31:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-26 21:31:12,930 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 214 [2018-09-26 21:31:12,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:12,930 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-26 21:31:12,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:31:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-26 21:31:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-26 21:31:12,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:12,931 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:12,931 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:12,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:12,932 INFO L82 PathProgramCache]: Analyzing trace with hash -348873538, now seen corresponding path program 53 times [2018-09-26 21:31:12,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:12,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:12,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:12,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:12,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:14,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:14,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:14,260 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:14,326 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-26 21:31:14,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:14,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:14,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:14,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:31:14,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:31:14,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:31:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:31:14,410 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 56 states. [2018-09-26 21:31:14,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:14,493 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-26 21:31:14,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:31:14,493 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-09-26 21:31:14,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:14,495 INFO L225 Difference]: With dead ends: 225 [2018-09-26 21:31:14,495 INFO L226 Difference]: Without dead ends: 223 [2018-09-26 21:31:14,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:31:14,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-26 21:31:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-26 21:31:14,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-26 21:31:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-26 21:31:14,499 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 218 [2018-09-26 21:31:14,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:14,499 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-26 21:31:14,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:31:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-26 21:31:14,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-26 21:31:14,501 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:14,501 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:14,501 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:14,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1269998744, now seen corresponding path program 54 times [2018-09-26 21:31:14,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:14,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:14,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:14,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:14,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:15,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:15,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:15,782 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:15,861 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-26 21:31:15,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:15,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:15,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:15,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:31:15,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:31:15,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:31:15,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:31:15,958 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 57 states. [2018-09-26 21:31:16,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:16,173 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-09-26 21:31:16,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:31:16,173 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-09-26 21:31:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:16,175 INFO L225 Difference]: With dead ends: 229 [2018-09-26 21:31:16,175 INFO L226 Difference]: Without dead ends: 227 [2018-09-26 21:31:16,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:31:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-26 21:31:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-26 21:31:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-26 21:31:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-09-26 21:31:16,179 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 222 [2018-09-26 21:31:16,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:16,179 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-09-26 21:31:16,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:31:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-09-26 21:31:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-26 21:31:16,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:16,181 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:16,181 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:16,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:16,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1338854126, now seen corresponding path program 55 times [2018-09-26 21:31:16,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:16,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:16,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:16,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:16,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:17,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:17,707 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 [2018-09-26 21:31:17,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:17,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:17,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:17,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:31:17,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:31:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:31:17,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:31:17,847 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 58 states. [2018-09-26 21:31:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:18,034 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-09-26 21:31:18,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:31:18,035 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-09-26 21:31:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:18,036 INFO L225 Difference]: With dead ends: 233 [2018-09-26 21:31:18,036 INFO L226 Difference]: Without dead ends: 231 [2018-09-26 21:31:18,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:31:18,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-26 21:31:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-26 21:31:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-26 21:31:18,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-09-26 21:31:18,041 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 226 [2018-09-26 21:31:18,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:18,041 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-09-26 21:31:18,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:31:18,041 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-09-26 21:31:18,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-26 21:31:18,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:18,043 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:18,043 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:18,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:18,043 INFO L82 PathProgramCache]: Analyzing trace with hash 555690428, now seen corresponding path program 56 times [2018-09-26 21:31:18,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:18,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:18,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:18,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:18,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:19,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:19,398 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 [2018-09-26 21:31:19,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:19,460 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:19,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:19,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:19,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:19,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:31:19,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:31:19,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:31:19,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:31:19,557 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 59 states. [2018-09-26 21:31:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:19,701 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-09-26 21:31:19,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:31:19,701 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-09-26 21:31:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:19,703 INFO L225 Difference]: With dead ends: 237 [2018-09-26 21:31:19,703 INFO L226 Difference]: Without dead ends: 235 [2018-09-26 21:31:19,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:31:19,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-26 21:31:19,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-26 21:31:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-26 21:31:19,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-09-26 21:31:19,707 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 230 [2018-09-26 21:31:19,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:19,707 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-09-26 21:31:19,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:31:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-09-26 21:31:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-26 21:31:19,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:19,708 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:19,709 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:19,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:19,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1475528346, now seen corresponding path program 57 times [2018-09-26 21:31:19,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:19,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:19,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:19,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:19,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:21,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:21,046 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 [2018-09-26 21:31:21,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:21,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-26 21:31:21,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:21,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:21,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:21,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:31:21,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:31:21,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:31:21,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:31:21,239 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 60 states. [2018-09-26 21:31:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:21,461 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-09-26 21:31:21,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:31:21,461 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-09-26 21:31:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:21,463 INFO L225 Difference]: With dead ends: 241 [2018-09-26 21:31:21,463 INFO L226 Difference]: Without dead ends: 239 [2018-09-26 21:31:21,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:31:21,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-26 21:31:21,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-26 21:31:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-26 21:31:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-09-26 21:31:21,466 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 234 [2018-09-26 21:31:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:21,467 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-09-26 21:31:21,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:31:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-09-26 21:31:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-26 21:31:21,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:21,468 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:21,468 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:21,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:21,468 INFO L82 PathProgramCache]: Analyzing trace with hash -457743344, now seen corresponding path program 58 times [2018-09-26 21:31:21,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:21,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:21,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:21,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:21,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:23,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:23,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:23,113 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:23,173 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:23,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:23,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:23,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:23,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:31:23,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:31:23,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:31:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:31:23,261 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 61 states. [2018-09-26 21:31:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:23,433 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-09-26 21:31:23,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:31:23,434 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-09-26 21:31:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:23,435 INFO L225 Difference]: With dead ends: 245 [2018-09-26 21:31:23,435 INFO L226 Difference]: Without dead ends: 243 [2018-09-26 21:31:23,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:31:23,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-26 21:31:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-26 21:31:23,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-26 21:31:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-09-26 21:31:23,439 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 238 [2018-09-26 21:31:23,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:23,439 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-09-26 21:31:23,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:31:23,440 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-09-26 21:31:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-26 21:31:23,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:23,441 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:23,441 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:23,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:23,441 INFO L82 PathProgramCache]: Analyzing trace with hash 362293690, now seen corresponding path program 59 times [2018-09-26 21:31:23,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:23,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:23,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:23,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:23,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:24,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:24,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:24,825 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:24,900 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-26 21:31:24,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:24,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:24,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:24,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:31:24,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:31:24,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:31:24,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:31:24,970 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 62 states. [2018-09-26 21:31:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:25,116 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-09-26 21:31:25,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:31:25,116 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-09-26 21:31:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:25,118 INFO L225 Difference]: With dead ends: 249 [2018-09-26 21:31:25,118 INFO L226 Difference]: Without dead ends: 247 [2018-09-26 21:31:25,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:31:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-26 21:31:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-26 21:31:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-26 21:31:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-09-26 21:31:25,123 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 242 [2018-09-26 21:31:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:25,123 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-09-26 21:31:25,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:31:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-09-26 21:31:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-26 21:31:25,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:25,125 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:25,125 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:25,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:25,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1209398684, now seen corresponding path program 60 times [2018-09-26 21:31:25,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:25,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:25,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:25,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:25,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:26,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:26,624 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 [2018-09-26 21:31:26,633 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:26,712 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-26 21:31:26,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:26,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:26,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:26,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:31:26,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:31:26,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:31:26,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:31:26,801 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 63 states. [2018-09-26 21:31:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:26,977 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-09-26 21:31:26,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:31:26,978 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-09-26 21:31:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:26,979 INFO L225 Difference]: With dead ends: 253 [2018-09-26 21:31:26,979 INFO L226 Difference]: Without dead ends: 251 [2018-09-26 21:31:26,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:31:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-26 21:31:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-26 21:31:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-26 21:31:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-09-26 21:31:26,983 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 246 [2018-09-26 21:31:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:26,983 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-09-26 21:31:26,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:31:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-09-26 21:31:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-26 21:31:26,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:26,984 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:26,985 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:26,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash 665290254, now seen corresponding path program 61 times [2018-09-26 21:31:26,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:26,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:26,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:26,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:26,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:28,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:28,847 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 [2018-09-26 21:31:28,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:28,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:28,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:28,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:31:28,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:31:28,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:31:28,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:31:28,992 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 64 states. [2018-09-26 21:31:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:29,144 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-09-26 21:31:29,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:31:29,145 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-09-26 21:31:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:29,146 INFO L225 Difference]: With dead ends: 257 [2018-09-26 21:31:29,147 INFO L226 Difference]: Without dead ends: 255 [2018-09-26 21:31:29,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:31:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-26 21:31:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-26 21:31:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-26 21:31:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-09-26 21:31:29,150 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 250 [2018-09-26 21:31:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:29,151 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-09-26 21:31:29,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:31:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-09-26 21:31:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-26 21:31:29,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:29,152 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:29,152 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:29,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1066081464, now seen corresponding path program 62 times [2018-09-26 21:31:29,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:29,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:29,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:29,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:30,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:30,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:30,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:30,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:30,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:30,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:30,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:30,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:31:30,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:31:30,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:31:30,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:31:30,936 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 65 states. [2018-09-26 21:31:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:31,088 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-09-26 21:31:31,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:31:31,088 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-09-26 21:31:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:31,090 INFO L225 Difference]: With dead ends: 261 [2018-09-26 21:31:31,090 INFO L226 Difference]: Without dead ends: 259 [2018-09-26 21:31:31,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:31:31,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-26 21:31:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-26 21:31:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-26 21:31:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-09-26 21:31:31,094 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 254 [2018-09-26 21:31:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:31,094 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-09-26 21:31:31,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:31:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-09-26 21:31:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-26 21:31:31,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:31,096 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:31,096 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:31,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:31,097 INFO L82 PathProgramCache]: Analyzing trace with hash -116437406, now seen corresponding path program 63 times [2018-09-26 21:31:31,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:31,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:31,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:31,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:31,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:32,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:32,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:32,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:33,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-26 21:31:33,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:33,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:33,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:33,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:31:33,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:31:33,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:31:33,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:31:33,081 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 66 states. [2018-09-26 21:31:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:33,248 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-09-26 21:31:33,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:31:33,249 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-09-26 21:31:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:33,251 INFO L225 Difference]: With dead ends: 265 [2018-09-26 21:31:33,251 INFO L226 Difference]: Without dead ends: 263 [2018-09-26 21:31:33,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:31:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-26 21:31:33,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-26 21:31:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-26 21:31:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-09-26 21:31:33,255 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 258 [2018-09-26 21:31:33,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:33,255 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-09-26 21:31:33,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:31:33,256 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-09-26 21:31:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-26 21:31:33,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:33,257 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:33,257 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:33,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:33,258 INFO L82 PathProgramCache]: Analyzing trace with hash 208575244, now seen corresponding path program 64 times [2018-09-26 21:31:33,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:33,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:33,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:33,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:33,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:35,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:35,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:35,017 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:35,066 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:35,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:35,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:35,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:35,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:31:35,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:31:35,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:31:35,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:31:35,143 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 67 states. [2018-09-26 21:31:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:35,345 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-09-26 21:31:35,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:31:35,346 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-09-26 21:31:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:35,347 INFO L225 Difference]: With dead ends: 269 [2018-09-26 21:31:35,348 INFO L226 Difference]: Without dead ends: 267 [2018-09-26 21:31:35,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:31:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-26 21:31:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-26 21:31:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-26 21:31:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-09-26 21:31:35,352 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 262 [2018-09-26 21:31:35,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:35,352 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-09-26 21:31:35,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:31:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-09-26 21:31:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-26 21:31:35,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:35,354 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:35,354 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:35,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1868332362, now seen corresponding path program 65 times [2018-09-26 21:31:35,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:35,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:35,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:35,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:35,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:37,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:37,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:37,017 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:37,113 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-26 21:31:37,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:37,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:37,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:37,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:31:37,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:31:37,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:31:37,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:31:37,218 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 68 states. [2018-09-26 21:31:37,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:37,382 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-09-26 21:31:37,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:31:37,382 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-09-26 21:31:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:37,384 INFO L225 Difference]: With dead ends: 273 [2018-09-26 21:31:37,384 INFO L226 Difference]: Without dead ends: 271 [2018-09-26 21:31:37,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:31:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-26 21:31:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-26 21:31:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-26 21:31:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-09-26 21:31:37,388 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 266 [2018-09-26 21:31:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:37,389 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-09-26 21:31:37,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:31:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-09-26 21:31:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-26 21:31:37,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:37,390 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:37,391 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:37,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1687648928, now seen corresponding path program 66 times [2018-09-26 21:31:37,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:37,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:37,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:37,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:39,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:39,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:39,472 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-26 21:31:39,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:39,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:39,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-26 21:31:39,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:31:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:31:39,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:31:39,559 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 69 states. [2018-09-26 21:31:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:39,732 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-09-26 21:31:39,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:31:39,733 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-09-26 21:31:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:39,735 INFO L225 Difference]: With dead ends: 277 [2018-09-26 21:31:39,735 INFO L226 Difference]: Without dead ends: 275 [2018-09-26 21:31:39,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:31:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-26 21:31:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-26 21:31:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-26 21:31:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-09-26 21:31:39,739 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 270 [2018-09-26 21:31:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:39,739 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-09-26 21:31:39,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:31:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-09-26 21:31:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-26 21:31:39,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:39,740 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:39,740 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:39,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:39,740 INFO L82 PathProgramCache]: Analyzing trace with hash -516414710, now seen corresponding path program 67 times [2018-09-26 21:31:39,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:39,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:39,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:39,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:39,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:41,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:41,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:41,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:41,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:41,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:41,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:31:41,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:31:41,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:31:41,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:31:41,564 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 70 states. [2018-09-26 21:31:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:41,791 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-09-26 21:31:41,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:31:41,792 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-09-26 21:31:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:41,794 INFO L225 Difference]: With dead ends: 281 [2018-09-26 21:31:41,794 INFO L226 Difference]: Without dead ends: 279 [2018-09-26 21:31:41,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:31:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-26 21:31:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-09-26 21:31:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-26 21:31:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-09-26 21:31:41,799 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 274 [2018-09-26 21:31:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:41,800 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-09-26 21:31:41,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:31:41,800 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-09-26 21:31:41,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-26 21:31:41,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:41,802 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:41,802 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:41,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:41,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1431100340, now seen corresponding path program 68 times [2018-09-26 21:31:41,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:41,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:41,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:41,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:43,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:43,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:43,923 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:43,976 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:43,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:43,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:44,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:44,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:31:44,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:31:44,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:31:44,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:31:44,072 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 71 states. [2018-09-26 21:31:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:44,276 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-09-26 21:31:44,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:31:44,277 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-09-26 21:31:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:44,278 INFO L225 Difference]: With dead ends: 285 [2018-09-26 21:31:44,278 INFO L226 Difference]: Without dead ends: 283 [2018-09-26 21:31:44,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:31:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-26 21:31:44,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-09-26 21:31:44,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-26 21:31:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-09-26 21:31:44,282 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 278 [2018-09-26 21:31:44,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:44,282 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-09-26 21:31:44,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:31:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-09-26 21:31:44,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-26 21:31:44,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:44,284 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:44,284 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:44,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash -912183458, now seen corresponding path program 69 times [2018-09-26 21:31:44,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:44,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:44,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:44,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:46,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:46,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:46,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:46,245 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-26 21:31:46,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:46,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:46,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:46,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:31:46,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:31:46,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:31:46,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:31:46,362 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 72 states. [2018-09-26 21:31:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:46,670 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-09-26 21:31:46,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:31:46,670 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-09-26 21:31:46,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:46,672 INFO L225 Difference]: With dead ends: 289 [2018-09-26 21:31:46,672 INFO L226 Difference]: Without dead ends: 287 [2018-09-26 21:31:46,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:31:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-09-26 21:31:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-09-26 21:31:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-09-26 21:31:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-09-26 21:31:46,675 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 282 [2018-09-26 21:31:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:46,676 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-09-26 21:31:46,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:31:46,676 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-09-26 21:31:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-26 21:31:46,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:46,677 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:46,677 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:46,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:46,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1896899064, now seen corresponding path program 70 times [2018-09-26 21:31:46,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:46,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:46,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:46,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:46,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:48,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:48,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:48,853 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:48,917 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:48,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:48,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:48,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:48,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-26 21:31:48,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:31:48,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:31:48,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:31:48,999 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 73 states. [2018-09-26 21:31:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:49,190 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-09-26 21:31:49,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:31:49,190 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-09-26 21:31:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:49,192 INFO L225 Difference]: With dead ends: 293 [2018-09-26 21:31:49,192 INFO L226 Difference]: Without dead ends: 291 [2018-09-26 21:31:49,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:31:49,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-26 21:31:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-09-26 21:31:49,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-26 21:31:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-09-26 21:31:49,196 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 286 [2018-09-26 21:31:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:49,197 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-09-26 21:31:49,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:31:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-09-26 21:31:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-26 21:31:49,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:49,198 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:49,198 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:49,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:49,199 INFO L82 PathProgramCache]: Analyzing trace with hash 347252658, now seen corresponding path program 71 times [2018-09-26 21:31:49,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:49,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:49,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:49,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:49,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:51,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:51,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:51,120 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:51,221 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-26 21:31:51,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:51,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:51,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:51,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:31:51,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:31:51,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:31:51,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:31:51,324 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 74 states. [2018-09-26 21:31:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:51,568 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-09-26 21:31:51,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:31:51,568 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-09-26 21:31:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:51,570 INFO L225 Difference]: With dead ends: 297 [2018-09-26 21:31:51,570 INFO L226 Difference]: Without dead ends: 295 [2018-09-26 21:31:51,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:31:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-09-26 21:31:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-09-26 21:31:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-09-26 21:31:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2018-09-26 21:31:51,574 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 290 [2018-09-26 21:31:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:51,575 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2018-09-26 21:31:51,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:31:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2018-09-26 21:31:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-26 21:31:51,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:51,576 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:51,577 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:51,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1994077092, now seen corresponding path program 72 times [2018-09-26 21:31:51,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:51,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:51,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:51,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:51,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:53,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:53,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:53,947 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:54,061 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-26 21:31:54,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:54,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:54,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:54,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-26 21:31:54,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:31:54,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:31:54,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:31:54,148 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 75 states. [2018-09-26 21:31:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:54,394 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-09-26 21:31:54,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:31:54,395 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-09-26 21:31:54,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:54,396 INFO L225 Difference]: With dead ends: 301 [2018-09-26 21:31:54,396 INFO L226 Difference]: Without dead ends: 299 [2018-09-26 21:31:54,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:31:54,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-26 21:31:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-09-26 21:31:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-26 21:31:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-09-26 21:31:54,400 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 294 [2018-09-26 21:31:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:54,400 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-09-26 21:31:54,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:31:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-09-26 21:31:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-26 21:31:54,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:54,402 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:54,402 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:54,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:54,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2034273286, now seen corresponding path program 73 times [2018-09-26 21:31:54,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:54,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:54,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:54,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:54,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:56,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:56,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:56,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:56,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:56,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:56,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:31:56,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:31:56,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:31:56,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:31:56,554 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 76 states. [2018-09-26 21:31:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:56,805 INFO L93 Difference]: Finished difference Result 305 states and 305 transitions. [2018-09-26 21:31:56,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:31:56,805 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-09-26 21:31:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:56,807 INFO L225 Difference]: With dead ends: 305 [2018-09-26 21:31:56,807 INFO L226 Difference]: Without dead ends: 303 [2018-09-26 21:31:56,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:31:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-26 21:31:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-09-26 21:31:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-09-26 21:31:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-09-26 21:31:56,810 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 298 [2018-09-26 21:31:56,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:56,811 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-09-26 21:31:56,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:31:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-09-26 21:31:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-26 21:31:56,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:56,812 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:56,812 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:56,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:56,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1891657392, now seen corresponding path program 74 times [2018-09-26 21:31:56,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:56,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:56,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:56,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:56,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:59,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:59,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:59,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:59,154 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:59,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:59,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:59,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:59,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-26 21:31:59,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:31:59,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:31:59,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:31:59,250 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 77 states. [2018-09-26 21:31:59,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:59,421 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-09-26 21:31:59,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:31:59,421 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-09-26 21:31:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:59,422 INFO L225 Difference]: With dead ends: 309 [2018-09-26 21:31:59,422 INFO L226 Difference]: Without dead ends: 307 [2018-09-26 21:31:59,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:31:59,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-09-26 21:31:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-09-26 21:31:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-09-26 21:31:59,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2018-09-26 21:31:59,426 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 302 [2018-09-26 21:31:59,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:59,426 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2018-09-26 21:31:59,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:31:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2018-09-26 21:31:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-09-26 21:31:59,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:59,428 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2018-09-26 21:31:59,428 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:59,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:59,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1709253542, now seen corresponding path program 75 times [2018-09-26 21:31:59,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:59,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:59,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:59,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:59,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:01,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:01,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:01,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:01,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-26 21:32:01,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:01,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:01,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:01,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:32:01,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:32:01,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:32:01,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:32:01,796 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 78 states. [2018-09-26 21:32:02,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:02,231 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-09-26 21:32:02,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:32:02,232 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-09-26 21:32:02,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:02,233 INFO L225 Difference]: With dead ends: 313 [2018-09-26 21:32:02,233 INFO L226 Difference]: Without dead ends: 311 [2018-09-26 21:32:02,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:32:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-09-26 21:32:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-09-26 21:32:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-09-26 21:32:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-09-26 21:32:02,238 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 306 [2018-09-26 21:32:02,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:02,238 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-09-26 21:32:02,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:32:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-09-26 21:32:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-26 21:32:02,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:02,240 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:02,240 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:02,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1586916612, now seen corresponding path program 76 times [2018-09-26 21:32:02,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:02,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:02,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:02,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:02,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:05,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:05,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:05,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:06,025 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:06,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:06,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:06,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:06,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-26 21:32:06,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:32:06,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:32:06,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:32:06,121 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 79 states. [2018-09-26 21:32:06,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:06,334 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2018-09-26 21:32:06,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:32:06,334 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-09-26 21:32:06,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:06,336 INFO L225 Difference]: With dead ends: 317 [2018-09-26 21:32:06,336 INFO L226 Difference]: Without dead ends: 315 [2018-09-26 21:32:06,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:32:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-26 21:32:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-09-26 21:32:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-09-26 21:32:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2018-09-26 21:32:06,340 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 310 [2018-09-26 21:32:06,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:06,341 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2018-09-26 21:32:06,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:32:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2018-09-26 21:32:06,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-09-26 21:32:06,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:06,342 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:06,342 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:06,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:06,342 INFO L82 PathProgramCache]: Analyzing trace with hash 102865070, now seen corresponding path program 77 times [2018-09-26 21:32:06,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:06,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:06,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:06,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:06,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:08,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:08,940 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 [2018-09-26 21:32:08,957 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:09,082 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-26 21:32:09,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:09,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:09,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:09,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:32:09,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:32:09,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:32:09,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:32:09,178 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 80 states. [2018-09-26 21:32:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:09,345 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2018-09-26 21:32:09,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:32:09,346 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-09-26 21:32:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:09,348 INFO L225 Difference]: With dead ends: 321 [2018-09-26 21:32:09,348 INFO L226 Difference]: Without dead ends: 319 [2018-09-26 21:32:09,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:32:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-09-26 21:32:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-09-26 21:32:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-09-26 21:32:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2018-09-26 21:32:09,352 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 314 [2018-09-26 21:32:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:09,352 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2018-09-26 21:32:09,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:32:09,353 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2018-09-26 21:32:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-26 21:32:09,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:09,354 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:09,354 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:09,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:09,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1467670360, now seen corresponding path program 78 times [2018-09-26 21:32:09,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:09,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:09,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:09,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:09,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:11,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:11,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:11,614 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:11,727 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-26 21:32:11,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:11,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:11,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:11,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-26 21:32:11,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:32:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:32:11,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:32:11,836 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand 81 states. [2018-09-26 21:32:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:12,001 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-09-26 21:32:12,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:32:12,001 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-09-26 21:32:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:12,002 INFO L225 Difference]: With dead ends: 325 [2018-09-26 21:32:12,002 INFO L226 Difference]: Without dead ends: 323 [2018-09-26 21:32:12,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:32:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-09-26 21:32:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-09-26 21:32:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-09-26 21:32:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-09-26 21:32:12,006 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 318 [2018-09-26 21:32:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:12,006 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-09-26 21:32:12,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:32:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-09-26 21:32:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-09-26 21:32:12,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:12,007 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:12,008 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:12,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:12,008 INFO L82 PathProgramCache]: Analyzing trace with hash 941408514, now seen corresponding path program 79 times [2018-09-26 21:32:12,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:12,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:12,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:12,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:12,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:14,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:14,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:14,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:14,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:14,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:14,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:32:14,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:32:14,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:32:14,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:32:14,756 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 82 states. [2018-09-26 21:32:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:14,919 INFO L93 Difference]: Finished difference Result 329 states and 329 transitions. [2018-09-26 21:32:14,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:32:14,919 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-09-26 21:32:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:14,921 INFO L225 Difference]: With dead ends: 329 [2018-09-26 21:32:14,921 INFO L226 Difference]: Without dead ends: 327 [2018-09-26 21:32:14,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:32:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-26 21:32:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-09-26 21:32:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-09-26 21:32:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2018-09-26 21:32:14,925 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 322 [2018-09-26 21:32:14,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:14,925 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2018-09-26 21:32:14,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:32:14,926 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2018-09-26 21:32:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-26 21:32:14,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:14,927 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:14,927 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:14,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:14,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1279376812, now seen corresponding path program 80 times [2018-09-26 21:32:14,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:14,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:14,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:14,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:14,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:17,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:17,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:17,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:17,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:17,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:17,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:17,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:17,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-26 21:32:17,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:32:17,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:32:17,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:32:17,572 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 83 states. [2018-09-26 21:32:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:17,878 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-09-26 21:32:17,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:32:17,879 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-09-26 21:32:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:17,880 INFO L225 Difference]: With dead ends: 333 [2018-09-26 21:32:17,880 INFO L226 Difference]: Without dead ends: 331 [2018-09-26 21:32:17,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:32:17,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-26 21:32:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-09-26 21:32:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-09-26 21:32:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2018-09-26 21:32:17,884 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 326 [2018-09-26 21:32:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:17,884 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2018-09-26 21:32:17,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:32:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2018-09-26 21:32:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-09-26 21:32:17,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:17,885 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:17,886 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:17,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:17,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1763420842, now seen corresponding path program 81 times [2018-09-26 21:32:17,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:17,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:17,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:17,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:17,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:20,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:20,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:20,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:20,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-26 21:32:20,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:20,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:20,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:20,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-26 21:32:20,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:32:20,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:32:20,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:32:20,961 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 84 states. [2018-09-26 21:32:21,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:21,216 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2018-09-26 21:32:21,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:32:21,217 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-09-26 21:32:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:21,219 INFO L225 Difference]: With dead ends: 337 [2018-09-26 21:32:21,219 INFO L226 Difference]: Without dead ends: 335 [2018-09-26 21:32:21,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:32:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-09-26 21:32:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-09-26 21:32:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-09-26 21:32:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2018-09-26 21:32:21,223 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 330 [2018-09-26 21:32:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:21,223 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2018-09-26 21:32:21,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:32:21,223 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2018-09-26 21:32:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-09-26 21:32:21,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:21,224 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:21,224 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:21,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:21,225 INFO L82 PathProgramCache]: Analyzing trace with hash 431949824, now seen corresponding path program 82 times [2018-09-26 21:32:21,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:21,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:21,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:21,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:21,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:23,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:23,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:23,787 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:23,853 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:23,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:23,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:23,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:23,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-26 21:32:23,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-26 21:32:23,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-26 21:32:23,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:32:23,994 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 85 states. [2018-09-26 21:32:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:24,329 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2018-09-26 21:32:24,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:32:24,329 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-09-26 21:32:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:24,331 INFO L225 Difference]: With dead ends: 341 [2018-09-26 21:32:24,332 INFO L226 Difference]: Without dead ends: 339 [2018-09-26 21:32:24,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:32:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-26 21:32:24,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-09-26 21:32:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-09-26 21:32:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2018-09-26 21:32:24,336 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 334 [2018-09-26 21:32:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:24,336 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2018-09-26 21:32:24,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-26 21:32:24,336 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2018-09-26 21:32:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-26 21:32:24,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:24,337 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:24,337 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:24,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:24,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1967936938, now seen corresponding path program 83 times [2018-09-26 21:32:24,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:24,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:24,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:24,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:24,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:26,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:26,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:26,919 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:27,065 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-26 21:32:27,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:27,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:27,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:27,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-26 21:32:27,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:32:27,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:32:27,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:32:27,175 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 86 states. [2018-09-26 21:32:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:27,443 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2018-09-26 21:32:27,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:32:27,444 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-09-26 21:32:27,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:27,446 INFO L225 Difference]: With dead ends: 345 [2018-09-26 21:32:27,446 INFO L226 Difference]: Without dead ends: 343 [2018-09-26 21:32:27,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:32:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-09-26 21:32:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-09-26 21:32:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-09-26 21:32:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2018-09-26 21:32:27,451 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 338 [2018-09-26 21:32:27,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:27,451 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2018-09-26 21:32:27,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:32:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2018-09-26 21:32:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-09-26 21:32:27,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:27,453 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:27,453 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:27,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:27,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2000241068, now seen corresponding path program 84 times [2018-09-26 21:32:27,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:27,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:27,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:27,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:27,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:30,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:30,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:30,426 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:30,553 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-26 21:32:30,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:30,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:30,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:30,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-26 21:32:30,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-26 21:32:30,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-26 21:32:30,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:32:30,665 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand 87 states. [2018-09-26 21:32:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:31,002 INFO L93 Difference]: Finished difference Result 349 states and 349 transitions. [2018-09-26 21:32:31,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:32:31,003 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-09-26 21:32:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:31,005 INFO L225 Difference]: With dead ends: 349 [2018-09-26 21:32:31,005 INFO L226 Difference]: Without dead ends: 347 [2018-09-26 21:32:31,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:32:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-09-26 21:32:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-09-26 21:32:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-09-26 21:32:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2018-09-26 21:32:31,010 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 342 [2018-09-26 21:32:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:31,011 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2018-09-26 21:32:31,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-26 21:32:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2018-09-26 21:32:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-09-26 21:32:31,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:31,013 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:31,014 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:31,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:31,014 INFO L82 PathProgramCache]: Analyzing trace with hash 304660990, now seen corresponding path program 85 times [2018-09-26 21:32:31,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:31,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:31,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:31,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:31,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:33,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:33,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:33,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:33,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:33,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:33,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-26 21:32:33,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:32:33,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:32:33,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:32:33,899 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 88 states. [2018-09-26 21:32:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:34,230 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-09-26 21:32:34,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:32:34,230 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-09-26 21:32:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:34,231 INFO L225 Difference]: With dead ends: 353 [2018-09-26 21:32:34,231 INFO L226 Difference]: Without dead ends: 351 [2018-09-26 21:32:34,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:32:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-26 21:32:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-09-26 21:32:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-09-26 21:32:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 351 transitions. [2018-09-26 21:32:34,236 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 351 transitions. Word has length 346 [2018-09-26 21:32:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:34,236 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 351 transitions. [2018-09-26 21:32:34,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:32:34,236 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 351 transitions. [2018-09-26 21:32:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-09-26 21:32:34,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:34,237 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:34,237 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:34,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:34,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1311563944, now seen corresponding path program 86 times [2018-09-26 21:32:34,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:34,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:34,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:34,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:34,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:37,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:37,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:37,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:37,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:37,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:37,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:37,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:37,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-26 21:32:37,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:32:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:32:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:32:37,244 INFO L87 Difference]: Start difference. First operand 351 states and 351 transitions. Second operand 89 states. [2018-09-26 21:32:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:37,597 INFO L93 Difference]: Finished difference Result 357 states and 357 transitions. [2018-09-26 21:32:37,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:32:37,598 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-09-26 21:32:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:37,599 INFO L225 Difference]: With dead ends: 357 [2018-09-26 21:32:37,599 INFO L226 Difference]: Without dead ends: 355 [2018-09-26 21:32:37,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:32:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-09-26 21:32:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-09-26 21:32:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-09-26 21:32:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2018-09-26 21:32:37,602 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 350 [2018-09-26 21:32:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:37,603 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2018-09-26 21:32:37,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:32:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2018-09-26 21:32:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-26 21:32:37,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:37,604 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:37,604 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:37,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:37,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1739744686, now seen corresponding path program 87 times [2018-09-26 21:32:37,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:37,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:37,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:37,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:37,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:40,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:40,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:40,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:40,901 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-26 21:32:40,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:40,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:41,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:41,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-26 21:32:41,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:32:41,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:32:41,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:32:41,013 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 90 states. [2018-09-26 21:32:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:41,206 INFO L93 Difference]: Finished difference Result 361 states and 361 transitions. [2018-09-26 21:32:41,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:32:41,206 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 354 [2018-09-26 21:32:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:41,208 INFO L225 Difference]: With dead ends: 361 [2018-09-26 21:32:41,209 INFO L226 Difference]: Without dead ends: 359 [2018-09-26 21:32:41,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:32:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-09-26 21:32:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-09-26 21:32:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-09-26 21:32:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 359 transitions. [2018-09-26 21:32:41,212 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 359 transitions. Word has length 354 [2018-09-26 21:32:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:41,212 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 359 transitions. [2018-09-26 21:32:41,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:32:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 359 transitions. [2018-09-26 21:32:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-09-26 21:32:41,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:41,214 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:41,214 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:41,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:41,214 INFO L82 PathProgramCache]: Analyzing trace with hash 180711164, now seen corresponding path program 88 times [2018-09-26 21:32:41,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:41,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:41,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:41,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:41,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:44,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:44,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:44,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:44,238 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:44,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:44,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:44,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:44,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-26 21:32:44,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-26 21:32:44,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-26 21:32:44,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:32:44,381 INFO L87 Difference]: Start difference. First operand 359 states and 359 transitions. Second operand 91 states. [2018-09-26 21:32:44,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:44,755 INFO L93 Difference]: Finished difference Result 365 states and 365 transitions. [2018-09-26 21:32:44,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:32:44,756 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 358 [2018-09-26 21:32:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:44,758 INFO L225 Difference]: With dead ends: 365 [2018-09-26 21:32:44,758 INFO L226 Difference]: Without dead ends: 363 [2018-09-26 21:32:44,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:32:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-26 21:32:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-09-26 21:32:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-09-26 21:32:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2018-09-26 21:32:44,762 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 358 [2018-09-26 21:32:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:44,762 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2018-09-26 21:32:44,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-26 21:32:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2018-09-26 21:32:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-09-26 21:32:44,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:44,763 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:44,764 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:44,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:44,764 INFO L82 PathProgramCache]: Analyzing trace with hash 512679590, now seen corresponding path program 89 times [2018-09-26 21:32:44,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:44,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:44,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:44,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:44,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:47,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:47,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:47,655 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:47,815 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-26 21:32:47,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:47,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:47,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:47,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-26 21:32:47,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:32:47,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:32:47,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:32:47,944 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 92 states. [2018-09-26 21:32:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:48,343 INFO L93 Difference]: Finished difference Result 369 states and 369 transitions. [2018-09-26 21:32:48,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:32:48,344 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 362 [2018-09-26 21:32:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:48,346 INFO L225 Difference]: With dead ends: 369 [2018-09-26 21:32:48,346 INFO L226 Difference]: Without dead ends: 367 [2018-09-26 21:32:48,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:32:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-09-26 21:32:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2018-09-26 21:32:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2018-09-26 21:32:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 367 transitions. [2018-09-26 21:32:48,350 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 367 transitions. Word has length 362 [2018-09-26 21:32:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:48,350 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 367 transitions. [2018-09-26 21:32:48,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:32:48,350 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 367 transitions. [2018-09-26 21:32:48,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-09-26 21:32:48,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:48,352 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:48,352 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:48,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1264871760, now seen corresponding path program 90 times [2018-09-26 21:32:48,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:48,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:48,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:48,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:48,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:51,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:51,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:51,608 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:51,795 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-26 21:32:51,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:51,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:51,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:51,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-26 21:32:51,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-26 21:32:51,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-26 21:32:51,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:32:51,907 INFO L87 Difference]: Start difference. First operand 367 states and 367 transitions. Second operand 93 states. [2018-09-26 21:32:52,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:52,290 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2018-09-26 21:32:52,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:32:52,291 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 366 [2018-09-26 21:32:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:52,293 INFO L225 Difference]: With dead ends: 373 [2018-09-26 21:32:52,293 INFO L226 Difference]: Without dead ends: 371 [2018-09-26 21:32:52,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:32:52,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2018-09-26 21:32:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2018-09-26 21:32:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-09-26 21:32:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2018-09-26 21:32:52,297 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 366 [2018-09-26 21:32:52,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:52,297 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2018-09-26 21:32:52,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-26 21:32:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2018-09-26 21:32:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-09-26 21:32:52,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:52,299 INFO L375 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:52,299 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:52,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:52,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1480552710, now seen corresponding path program 91 times [2018-09-26 21:32:52,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:52,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:52,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:52,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:52,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:55,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:55,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:55,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:55,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:55,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:55,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-26 21:32:55,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:32:55,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:32:55,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:32:55,912 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand 94 states. [2018-09-26 21:32:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:56,322 INFO L93 Difference]: Finished difference Result 377 states and 377 transitions. [2018-09-26 21:32:56,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:32:56,323 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 370 [2018-09-26 21:32:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:56,325 INFO L225 Difference]: With dead ends: 377 [2018-09-26 21:32:56,325 INFO L226 Difference]: Without dead ends: 375 [2018-09-26 21:32:56,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:32:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-09-26 21:32:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2018-09-26 21:32:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2018-09-26 21:32:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 375 transitions. [2018-09-26 21:32:56,329 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 375 transitions. Word has length 370 [2018-09-26 21:32:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:56,329 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 375 transitions. [2018-09-26 21:32:56,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:32:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 375 transitions. [2018-09-26 21:32:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-09-26 21:32:56,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:56,331 INFO L375 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1] [2018-09-26 21:32:56,331 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:56,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:56,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1998729308, now seen corresponding path program 92 times [2018-09-26 21:32:56,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:56,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:56,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:56,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:56,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:00,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:00,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:00,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:00,693 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:00,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:00,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:00,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:00,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-26 21:33:00,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:33:00,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:33:00,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:33:00,818 INFO L87 Difference]: Start difference. First operand 375 states and 375 transitions. Second operand 95 states. [2018-09-26 21:33:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:01,228 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2018-09-26 21:33:01,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:33:01,228 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 374 [2018-09-26 21:33:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:01,230 INFO L225 Difference]: With dead ends: 381 [2018-09-26 21:33:01,230 INFO L226 Difference]: Without dead ends: 379 [2018-09-26 21:33:01,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:33:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2018-09-26 21:33:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2018-09-26 21:33:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-09-26 21:33:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 379 transitions. [2018-09-26 21:33:01,233 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 379 transitions. Word has length 374 [2018-09-26 21:33:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:01,234 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 379 transitions. [2018-09-26 21:33:01,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:33:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 379 transitions. [2018-09-26 21:33:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-09-26 21:33:01,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:01,235 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:01,235 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:01,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:01,236 INFO L82 PathProgramCache]: Analyzing trace with hash 582396750, now seen corresponding path program 93 times [2018-09-26 21:33:01,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:01,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:01,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:01,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:01,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:04,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:04,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:04,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:04,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-26 21:33:04,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:04,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:04,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:04,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-26 21:33:04,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:33:04,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:33:04,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:33:04,809 INFO L87 Difference]: Start difference. First operand 379 states and 379 transitions. Second operand 96 states. [2018-09-26 21:33:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:05,093 INFO L93 Difference]: Finished difference Result 385 states and 385 transitions. [2018-09-26 21:33:05,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:33:05,093 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 378 [2018-09-26 21:33:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:05,096 INFO L225 Difference]: With dead ends: 385 [2018-09-26 21:33:05,096 INFO L226 Difference]: Without dead ends: 383 [2018-09-26 21:33:05,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:33:05,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-09-26 21:33:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-09-26 21:33:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-09-26 21:33:05,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 383 transitions. [2018-09-26 21:33:05,100 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 383 transitions. Word has length 378 [2018-09-26 21:33:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:05,100 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 383 transitions. [2018-09-26 21:33:05,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:33:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 383 transitions. [2018-09-26 21:33:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-09-26 21:33:05,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:05,102 INFO L375 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:05,102 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:05,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:05,102 INFO L82 PathProgramCache]: Analyzing trace with hash 671457784, now seen corresponding path program 94 times [2018-09-26 21:33:05,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:05,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:05,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:05,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:05,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:08,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:08,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:08,512 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:08,592 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:08,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:08,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:08,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:08,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-26 21:33:08,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-26 21:33:08,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-26 21:33:08,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:33:08,742 INFO L87 Difference]: Start difference. First operand 383 states and 383 transitions. Second operand 97 states. [2018-09-26 21:33:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:09,180 INFO L93 Difference]: Finished difference Result 389 states and 389 transitions. [2018-09-26 21:33:09,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:33:09,180 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 382 [2018-09-26 21:33:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:09,182 INFO L225 Difference]: With dead ends: 389 [2018-09-26 21:33:09,183 INFO L226 Difference]: Without dead ends: 387 [2018-09-26 21:33:09,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:33:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-09-26 21:33:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2018-09-26 21:33:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-09-26 21:33:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2018-09-26 21:33:09,187 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 382 [2018-09-26 21:33:09,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:09,187 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2018-09-26 21:33:09,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-26 21:33:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2018-09-26 21:33:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-09-26 21:33:09,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:09,189 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:09,189 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:09,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1782920098, now seen corresponding path program 95 times [2018-09-26 21:33:09,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:09,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:09,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:09,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:09,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:12,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:12,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:12,828 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:12,985 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-26 21:33:12,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:12,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:13,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:13,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-26 21:33:13,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:33:13,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:33:13,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:33:13,108 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand 98 states. [2018-09-26 21:33:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:13,590 INFO L93 Difference]: Finished difference Result 393 states and 393 transitions. [2018-09-26 21:33:13,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:33:13,590 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 386 [2018-09-26 21:33:13,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:13,592 INFO L225 Difference]: With dead ends: 393 [2018-09-26 21:33:13,592 INFO L226 Difference]: Without dead ends: 391 [2018-09-26 21:33:13,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:33:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-09-26 21:33:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2018-09-26 21:33:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-09-26 21:33:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 391 transitions. [2018-09-26 21:33:13,597 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 391 transitions. Word has length 386 [2018-09-26 21:33:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:13,597 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 391 transitions. [2018-09-26 21:33:13,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:33:13,597 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 391 transitions. [2018-09-26 21:33:13,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-09-26 21:33:13,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:13,598 INFO L375 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:13,599 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:13,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:13,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2041569356, now seen corresponding path program 96 times [2018-09-26 21:33:13,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:13,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:13,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:13,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:13,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:17,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:17,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:17,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:17,508 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-26 21:33:17,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:17,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:17,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:17,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-26 21:33:17,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-26 21:33:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-26 21:33:17,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:33:17,644 INFO L87 Difference]: Start difference. First operand 391 states and 391 transitions. Second operand 99 states. [2018-09-26 21:33:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:18,155 INFO L93 Difference]: Finished difference Result 397 states and 397 transitions. [2018-09-26 21:33:18,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:33:18,155 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 390 [2018-09-26 21:33:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:18,157 INFO L225 Difference]: With dead ends: 397 [2018-09-26 21:33:18,157 INFO L226 Difference]: Without dead ends: 395 [2018-09-26 21:33:18,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:33:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-09-26 21:33:18,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2018-09-26 21:33:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-09-26 21:33:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2018-09-26 21:33:18,162 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 390 [2018-09-26 21:33:18,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:18,162 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2018-09-26 21:33:18,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-26 21:33:18,162 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2018-09-26 21:33:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-09-26 21:33:18,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:18,163 INFO L375 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:18,164 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:18,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:18,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1161832438, now seen corresponding path program 97 times [2018-09-26 21:33:18,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:18,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:18,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:18,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:18,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:22,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:22,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:22,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:22,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:22,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:22,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-26 21:33:22,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:33:22,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:33:22,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:33:22,229 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 100 states. [2018-09-26 21:33:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:22,762 INFO L93 Difference]: Finished difference Result 401 states and 401 transitions. [2018-09-26 21:33:22,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:33:22,762 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 394 [2018-09-26 21:33:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:22,765 INFO L225 Difference]: With dead ends: 401 [2018-09-26 21:33:22,765 INFO L226 Difference]: Without dead ends: 399 [2018-09-26 21:33:22,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:33:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-09-26 21:33:22,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2018-09-26 21:33:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-09-26 21:33:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 399 transitions. [2018-09-26 21:33:22,770 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 399 transitions. Word has length 394 [2018-09-26 21:33:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:22,770 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 399 transitions. [2018-09-26 21:33:22,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:33:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 399 transitions. [2018-09-26 21:33:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-09-26 21:33:22,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:22,772 INFO L375 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:22,772 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:22,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:22,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1162835296, now seen corresponding path program 98 times [2018-09-26 21:33:22,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:22,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:22,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:22,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:22,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:26,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:26,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:26,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:26,845 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:26,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:26,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:26,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:26,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-26 21:33:26,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:33:26,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:33:26,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:33:26,983 INFO L87 Difference]: Start difference. First operand 399 states and 399 transitions. Second operand 101 states. [2018-09-26 21:33:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:27,467 INFO L93 Difference]: Finished difference Result 405 states and 405 transitions. [2018-09-26 21:33:27,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 21:33:27,468 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 398 [2018-09-26 21:33:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:27,470 INFO L225 Difference]: With dead ends: 405 [2018-09-26 21:33:27,470 INFO L226 Difference]: Without dead ends: 403 [2018-09-26 21:33:27,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:33:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-09-26 21:33:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2018-09-26 21:33:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-09-26 21:33:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2018-09-26 21:33:27,474 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 398 [2018-09-26 21:33:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:27,475 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2018-09-26 21:33:27,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:33:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2018-09-26 21:33:27,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-09-26 21:33:27,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:27,477 INFO L375 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:27,477 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:27,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:27,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1719371850, now seen corresponding path program 99 times [2018-09-26 21:33:27,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:27,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:27,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:27,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:27,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:31,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:31,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:31,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:31,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-26 21:33:31,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:31,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:31,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:31,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-26 21:33:31,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:33:31,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:33:31,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:33:31,749 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 102 states. [2018-09-26 21:33:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:32,072 INFO L93 Difference]: Finished difference Result 409 states and 409 transitions. [2018-09-26 21:33:32,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:33:32,072 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 402 [2018-09-26 21:33:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:32,074 INFO L225 Difference]: With dead ends: 409 [2018-09-26 21:33:32,075 INFO L226 Difference]: Without dead ends: 407 [2018-09-26 21:33:32,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:33:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-09-26 21:33:32,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2018-09-26 21:33:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-09-26 21:33:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2018-09-26 21:33:32,080 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 402 [2018-09-26 21:33:32,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:32,080 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2018-09-26 21:33:32,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:33:32,080 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2018-09-26 21:33:32,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-09-26 21:33:32,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:32,082 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:32,083 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:32,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:32,083 INFO L82 PathProgramCache]: Analyzing trace with hash 333160692, now seen corresponding path program 100 times [2018-09-26 21:33:32,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:32,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:32,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:32,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:32,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:36,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:36,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:36,336 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:36,417 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:36,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:36,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:36,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:36,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-26 21:33:36,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-26 21:33:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-26 21:33:36,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:33:36,549 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand 103 states. [2018-09-26 21:33:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:37,096 INFO L93 Difference]: Finished difference Result 413 states and 413 transitions. [2018-09-26 21:33:37,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 21:33:37,096 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 406 [2018-09-26 21:33:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:37,099 INFO L225 Difference]: With dead ends: 413 [2018-09-26 21:33:37,099 INFO L226 Difference]: Without dead ends: 411 [2018-09-26 21:33:37,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:33:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-26 21:33:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2018-09-26 21:33:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-09-26 21:33:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 411 transitions. [2018-09-26 21:33:37,104 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 411 transitions. Word has length 406 [2018-09-26 21:33:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:37,104 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 411 transitions. [2018-09-26 21:33:37,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-26 21:33:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 411 transitions. [2018-09-26 21:33:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-09-26 21:33:37,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:37,106 INFO L375 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:37,106 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:37,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:37,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1825264798, now seen corresponding path program 101 times [2018-09-26 21:33:37,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:37,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:37,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:37,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:37,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:41,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:41,359 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 [2018-09-26 21:33:41,368 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:41,548 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-26 21:33:41,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:41,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:41,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:41,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-26 21:33:41,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:33:41,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:33:41,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:33:41,714 INFO L87 Difference]: Start difference. First operand 411 states and 411 transitions. Second operand 104 states. [2018-09-26 21:33:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:42,265 INFO L93 Difference]: Finished difference Result 417 states and 417 transitions. [2018-09-26 21:33:42,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 21:33:42,266 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 410 [2018-09-26 21:33:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:42,267 INFO L225 Difference]: With dead ends: 417 [2018-09-26 21:33:42,267 INFO L226 Difference]: Without dead ends: 415 [2018-09-26 21:33:42,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:33:42,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-09-26 21:33:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-09-26 21:33:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-09-26 21:33:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 415 transitions. [2018-09-26 21:33:42,273 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 415 transitions. Word has length 410 [2018-09-26 21:33:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:42,273 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 415 transitions. [2018-09-26 21:33:42,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:33:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 415 transitions. [2018-09-26 21:33:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-09-26 21:33:42,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:42,275 INFO L375 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:42,276 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:42,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:42,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1710939320, now seen corresponding path program 102 times [2018-09-26 21:33:42,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:42,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:42,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:42,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:42,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:46,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:46,340 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 [2018-09-26 21:33:46,348 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:46,523 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-26 21:33:46,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:46,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:46,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:46,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-26 21:33:46,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-26 21:33:46,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-26 21:33:46,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-26 21:33:46,671 INFO L87 Difference]: Start difference. First operand 415 states and 415 transitions. Second operand 105 states. [2018-09-26 21:33:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:47,209 INFO L93 Difference]: Finished difference Result 421 states and 421 transitions. [2018-09-26 21:33:47,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-26 21:33:47,209 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 414 [2018-09-26 21:33:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:47,211 INFO L225 Difference]: With dead ends: 421 [2018-09-26 21:33:47,211 INFO L226 Difference]: Without dead ends: 419 [2018-09-26 21:33:47,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-26 21:33:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-09-26 21:33:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2018-09-26 21:33:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2018-09-26 21:33:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2018-09-26 21:33:47,216 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 414 [2018-09-26 21:33:47,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:47,217 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2018-09-26 21:33:47,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-26 21:33:47,217 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2018-09-26 21:33:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-09-26 21:33:47,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:47,219 INFO L375 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:47,219 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:47,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:47,220 INFO L82 PathProgramCache]: Analyzing trace with hash -486306574, now seen corresponding path program 103 times [2018-09-26 21:33:47,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:47,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:47,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:47,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:47,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:51,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:51,657 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 [2018-09-26 21:33:51,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:51,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:51,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:51,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-26 21:33:51,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 21:33:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 21:33:51,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:33:51,890 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand 106 states. [2018-09-26 21:33:52,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:52,449 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2018-09-26 21:33:52,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-26 21:33:52,449 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 418 [2018-09-26 21:33:52,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:52,451 INFO L225 Difference]: With dead ends: 425 [2018-09-26 21:33:52,451 INFO L226 Difference]: Without dead ends: 423 [2018-09-26 21:33:52,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-26 21:33:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-09-26 21:33:52,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2018-09-26 21:33:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2018-09-26 21:33:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 423 transitions. [2018-09-26 21:33:52,455 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 423 transitions. Word has length 418 [2018-09-26 21:33:52,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:52,455 INFO L480 AbstractCegarLoop]: Abstraction has 423 states and 423 transitions. [2018-09-26 21:33:52,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 21:33:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 423 transitions. [2018-09-26 21:33:52,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-09-26 21:33:52,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:52,458 INFO L375 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:52,458 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:52,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:52,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1308692892, now seen corresponding path program 104 times [2018-09-26 21:33:52,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:52,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:52,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:52,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:52,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:56,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:56,813 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 [2018-09-26 21:33:56,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:56,898 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:56,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:56,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:57,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:57,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-26 21:33:57,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-26 21:33:57,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-26 21:33:57,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:33:57,107 INFO L87 Difference]: Start difference. First operand 423 states and 423 transitions. Second operand 107 states. [2018-09-26 21:33:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:57,736 INFO L93 Difference]: Finished difference Result 429 states and 429 transitions. [2018-09-26 21:33:57,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-26 21:33:57,736 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 422 [2018-09-26 21:33:57,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:57,737 INFO L225 Difference]: With dead ends: 429 [2018-09-26 21:33:57,737 INFO L226 Difference]: Without dead ends: 427 [2018-09-26 21:33:57,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:33:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-09-26 21:33:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2018-09-26 21:33:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2018-09-26 21:33:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 427 transitions. [2018-09-26 21:33:57,743 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 427 transitions. Word has length 422 [2018-09-26 21:33:57,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:57,743 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 427 transitions. [2018-09-26 21:33:57,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-26 21:33:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 427 transitions. [2018-09-26 21:33:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-09-26 21:33:57,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:57,746 INFO L375 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1] [2018-09-26 21:33:57,746 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:57,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:57,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1073230150, now seen corresponding path program 105 times [2018-09-26 21:33:57,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:57,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:57,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:57,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:57,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:02,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:02,036 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 [2018-09-26 21:34:02,043 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:02,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-26 21:34:02,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:02,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:02,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:02,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-26 21:34:02,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:34:02,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:34:02,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:34:02,394 INFO L87 Difference]: Start difference. First operand 427 states and 427 transitions. Second operand 108 states. [2018-09-26 21:34:02,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:02,804 INFO L93 Difference]: Finished difference Result 433 states and 433 transitions. [2018-09-26 21:34:02,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-26 21:34:02,805 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 426 [2018-09-26 21:34:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:02,806 INFO L225 Difference]: With dead ends: 433 [2018-09-26 21:34:02,806 INFO L226 Difference]: Without dead ends: 431 [2018-09-26 21:34:02,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:34:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-09-26 21:34:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2018-09-26 21:34:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2018-09-26 21:34:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 431 transitions. [2018-09-26 21:34:02,810 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 431 transitions. Word has length 426 [2018-09-26 21:34:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:02,811 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 431 transitions. [2018-09-26 21:34:02,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:34:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 431 transitions. [2018-09-26 21:34:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-09-26 21:34:02,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:02,812 INFO L375 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1] [2018-09-26 21:34:02,812 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:02,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:02,813 INFO L82 PathProgramCache]: Analyzing trace with hash 480472048, now seen corresponding path program 106 times [2018-09-26 21:34:02,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:02,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:02,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:02,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:02,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:07,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:07,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:34:07,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:07,344 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:07,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:07,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:07,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:07,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-26 21:34:07,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-26 21:34:07,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-26 21:34:07,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-26 21:34:07,493 INFO L87 Difference]: Start difference. First operand 431 states and 431 transitions. Second operand 109 states. [2018-09-26 21:34:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:08,139 INFO L93 Difference]: Finished difference Result 437 states and 437 transitions. [2018-09-26 21:34:08,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-26 21:34:08,140 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 430 [2018-09-26 21:34:08,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:08,141 INFO L225 Difference]: With dead ends: 437 [2018-09-26 21:34:08,141 INFO L226 Difference]: Without dead ends: 435 [2018-09-26 21:34:08,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-26 21:34:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-09-26 21:34:08,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2018-09-26 21:34:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2018-09-26 21:34:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 435 transitions. [2018-09-26 21:34:08,146 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 435 transitions. Word has length 430 [2018-09-26 21:34:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:08,146 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 435 transitions. [2018-09-26 21:34:08,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-26 21:34:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 435 transitions. [2018-09-26 21:34:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-09-26 21:34:08,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:08,149 INFO L375 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1] [2018-09-26 21:34:08,149 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:08,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:08,149 INFO L82 PathProgramCache]: Analyzing trace with hash -427998822, now seen corresponding path program 107 times [2018-09-26 21:34:08,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:08,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:08,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:08,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:08,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 21:34:11,640 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:34:11,644 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:34:11,644 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:34:11 BoogieIcfgContainer [2018-09-26 21:34:11,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:34:11,645 INFO L168 Benchmark]: Toolchain (without parser) took 233713.89 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 75.0 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -50.3 MB). Peak memory consumption was 696.7 MB. Max. memory is 7.1 GB. [2018-09-26 21:34:11,646 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 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. [2018-09-26 21:34:11,647 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:34:11,647 INFO L168 Benchmark]: Boogie Preprocessor took 26.04 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. [2018-09-26 21:34:11,647 INFO L168 Benchmark]: RCFGBuilder took 458.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:34:11,648 INFO L168 Benchmark]: TraceAbstraction took 233180.08 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 75.0 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -71.5 MB). Peak memory consumption was 675.5 MB. Max. memory is 7.1 GB. [2018-09-26 21:34:11,649 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 0.22 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 43.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.04 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 458.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233180.08 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 75.0 MB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -71.5 MB). Peak memory consumption was 675.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 41). Cancelled while BasicCegarLoop was analyzing trace of length 435 with TraceHistMax 107, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 95 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 233.1s OverallTime, 109 OverallIterations, 107 TraceHistogramMax, 25.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 972 SDtfs, 573 SDslu, 20846 SDs, 0 SdLazy, 9401 SolverSat, 190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29101 GetRequests, 23322 SyntacticMatches, 0 SemanticMatches, 5779 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 177.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=435occurred in iteration=108, 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: 0.3s AutomataMinimizationTime, 108 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 7.8s SatisfiabilityAnalysisTime, 186.9s InterpolantComputationTime, 46652 NumberOfCodeBlocks, 46652 NumberOfCodeBlocksAsserted, 3041 NumberOfCheckSat, 46438 ConstructedInterpolants, 0 QuantifiedInterpolants, 39937730 SizeOfPredicates, 106 NumberOfNonLiveVariables, 35298 ConjunctsInSsa, 5883 ConjunctsInUnsatCore, 214 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1599222 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/Luxembourg-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-34-11-658.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-34-11-658.csv Completed graceful shutdown