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/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:34:02,773 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:34:02,775 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:34:02,789 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:34:02,789 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:34:02,790 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:34:02,792 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:34:02,794 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:34:02,795 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:34:02,796 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:34:02,797 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:34:02,797 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:34:02,798 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:34:02,799 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:34:02,800 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:34:02,801 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:34:02,802 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:34:02,804 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:34:02,806 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:34:02,810 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:34:02,811 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:34:02,814 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:34:02,819 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:34:02,831 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 21:34:02,845 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:34:02,846 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:34:02,846 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:34:02,847 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:34:02,847 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:34:02,847 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:34:02,848 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:34:02,848 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:34:02,848 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:34:02,848 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:34:02,848 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:34:02,849 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:34:02,849 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:34:02,849 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:34:02,849 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:34:02,849 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:34:02,849 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:34:02,850 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:34:02,850 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:34:02,850 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:34:02,850 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:34:02,850 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:34:02,851 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:34:02,851 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:34:02,851 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:34:02,851 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:34:02,851 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:34:02,852 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:34:02,852 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:34:02,852 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:34:02,897 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:34:02,913 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:34:02,917 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:34:02,918 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:34:02,919 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:34:02,919 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-09-26 21:34:02,920 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-09-26 21:34:02,961 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:34:02,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:34:02,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:34:02,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:34:02,966 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:34:02,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:02" (1/1) ... [2018-09-26 21:34:02,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:02" (1/1) ... [2018-09-26 21:34:03,004 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:34:03,004 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:34:03,004 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:34:03,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:34:03,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:34:03,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:34:03,008 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:34:03,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:02" (1/1) ... [2018-09-26 21:34:03,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:02" (1/1) ... [2018-09-26 21:34:03,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:02" (1/1) ... [2018-09-26 21:34:03,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:02" (1/1) ... [2018-09-26 21:34:03,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:02" (1/1) ... [2018-09-26 21:34:03,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:02" (1/1) ... [2018-09-26 21:34:03,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:02" (1/1) ... [2018-09-26 21:34:03,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:34:03,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:34:03,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:34:03,032 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:34:03,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:02" (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 21:34:03,112 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-09-26 21:34:03,112 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-09-26 21:34:03,403 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:34:03,404 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:34:03 BoogieIcfgContainer [2018-09-26 21:34:03,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:34:03,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:34:03,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:34:03,409 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:34:03,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:34:02" (1/2) ... [2018-09-26 21:34:03,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197e6926 and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:34:03, skipping insertion in model container [2018-09-26 21:34:03,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:34:03" (2/2) ... [2018-09-26 21:34:03,412 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-09-26 21:34:03,422 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:34:03,430 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-09-26 21:34:03,482 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:34:03,483 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:34:03,483 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:34:03,484 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:34:03,484 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:34:03,484 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:34:03,484 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:34:03,484 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:34:03,485 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:34:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-26 21:34:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:34:03,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:03,508 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:34:03,510 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:03,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-09-26 21:34:03,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:03,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:03,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:03,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:03,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:03,658 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 21:34:03,660 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:34:03,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-26 21:34:03,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:34:03,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:34:03,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:34:03,681 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-09-26 21:34:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:03,765 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-26 21:34:03,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:34:03,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 21:34:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:03,788 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:34:03,798 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:34:03,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:34:03,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:34:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:34:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:34:03,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-26 21:34:03,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-09-26 21:34:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:03,876 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-26 21:34:03,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:34:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-26 21:34:03,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:34:03,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:03,878 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-26 21:34:03,879 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:03,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:03,879 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-09-26 21:34:03,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:03,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:03,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:03,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:03,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:03,897 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 21:34:03,898 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:34:03,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-26 21:34:03,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:34:03,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:34:03,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:34:03,900 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-09-26 21:34:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:03,946 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-26 21:34:03,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:34:03,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-26 21:34:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:03,955 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:34:03,956 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:34:03,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:34:03,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:34:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:34:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:34:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-26 21:34:03,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-26 21:34:03,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:03,960 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-26 21:34:03,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:34:03,960 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-26 21:34:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:34:03,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:03,963 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:34:03,963 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:03,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-09-26 21:34:03,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:03,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:03,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:03,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:03,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:04,041 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:34:04,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:34:04,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:34:04,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:34:04,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:34:04,043 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-26 21:34:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:04,109 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-26 21:34:04,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:34:04,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:34:04,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:04,110 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:34:04,110 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:34:04,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:34:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:34:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:34:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:34:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-26 21:34:04,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-26 21:34:04,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:04,115 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-26 21:34:04,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:34:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-26 21:34:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:34:04,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:04,116 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:34:04,116 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:04,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:04,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-09-26 21:34:04,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:04,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:04,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:04,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:04,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:04,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:04,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:04,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:04,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:04,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:04,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-26 21:34:04,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:34:04,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:34:04,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:34:04,316 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-09-26 21:34:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:04,382 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-09-26 21:34:04,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:34:04,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-26 21:34:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:04,383 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:34:04,384 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:34:04,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:34:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:34:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-09-26 21:34:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:34:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-26 21:34:04,388 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-26 21:34:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:04,388 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-26 21:34:04,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:34:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-26 21:34:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:34:04,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:04,389 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:34:04,389 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:04,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:04,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-09-26 21:34:04,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:04,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:04,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:04,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:04,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:04,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:04,454 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) [2018-09-26 21:34:04,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:04,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:04,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:04,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:04,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:04,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:34:04,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:34:04,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:34:04,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:34:04,533 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-09-26 21:34:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:04,599 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-09-26 21:34:04,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:34:04,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:34:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:04,600 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:34:04,601 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:34:04,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:34:04,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:34:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:34:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:34:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-26 21:34:04,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-09-26 21:34:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:04,605 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-26 21:34:04,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:34:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-26 21:34:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:34:04,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:04,606 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:34:04,606 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:04,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:04,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-09-26 21:34:04,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:04,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:04,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:04,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:04,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:04,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:04,802 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 21:34:04,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:04,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-26 21:34:04,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:04,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:04,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:04,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:34:04,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:34:04,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:34:04,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:34:04,853 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-26 21:34:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:04,926 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-26 21:34:04,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:34:04,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:34:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:04,927 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:34:04,928 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:34:04,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:34:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:34:04,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:34:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:34:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-09-26 21:34:04,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-09-26 21:34:04,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:04,932 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-09-26 21:34:04,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:34:04,933 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-09-26 21:34:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:34:04,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:04,934 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:34:04,934 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:04,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:04,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-09-26 21:34:04,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:04,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:04,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:04,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:04,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:05,098 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 21:34:05,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:05,098 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 21:34:05,111 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:05,125 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:05,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:05,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:05,137 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 21:34:05,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:05,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:34:05,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:34:05,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:34:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:34:05,160 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-09-26 21:34:05,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:05,246 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-09-26 21:34:05,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:34:05,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-09-26 21:34:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:05,248 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:34:05,249 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:34:05,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:34:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:34:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-09-26 21:34:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:34:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-26 21:34:05,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-26 21:34:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:05,254 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-26 21:34:05,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:34:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-26 21:34:05,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:34:05,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:05,257 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-26 21:34:05,257 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:05,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:05,257 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-09-26 21:34:05,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:05,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:05,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:05,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:05,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:05,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:05,376 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 21:34:05,384 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:05,396 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-09-26 21:34:05,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:05,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:05,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:05,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:34:05,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:34:05,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:34:05,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:34:05,432 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-09-26 21:34:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:05,506 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-09-26 21:34:05,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:34:05,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 21:34:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:05,508 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:34:05,508 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:34:05,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:34:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:34:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:34:05,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:34:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-26 21:34:05,512 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-09-26 21:34:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:05,512 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-26 21:34:05,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:34:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-26 21:34:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:34:05,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:05,513 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-09-26 21:34:05,514 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:05,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-09-26 21:34:05,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:05,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:05,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:05,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:05,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:05,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:05,572 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 21:34:05,580 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:05,591 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-09-26 21:34:05,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:05,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:05,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:05,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:34:05,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:34:05,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:34:05,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:34:05,635 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-09-26 21:34:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:05,677 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-26 21:34:05,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:34:05,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 21:34:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:05,679 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:34:05,679 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:34:05,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:34:05,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:34:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:34:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:34:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-09-26 21:34:05,683 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-09-26 21:34:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:05,683 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-09-26 21:34:05,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:34:05,684 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-09-26 21:34:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:34:05,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:05,685 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:34:05,685 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:05,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:05,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-09-26 21:34:05,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:05,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:05,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:05,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:05,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:05,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:05,808 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 21:34:05,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:05,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:05,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:05,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:34:05,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:34:05,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:34:05,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:34:05,940 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-09-26 21:34:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:06,203 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-26 21:34:06,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:34:06,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-09-26 21:34:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:06,205 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:34:06,205 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:34:06,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:34:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:34:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-26 21:34:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:34:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-26 21:34:06,209 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-09-26 21:34:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:06,209 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-26 21:34:06,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:34:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-26 21:34:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:34:06,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:06,210 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-26 21:34:06,211 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:06,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:06,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-09-26 21:34:06,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:06,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:06,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:06,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:06,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:06,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:06,299 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 21:34:06,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:06,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:06,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:06,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:06,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:06,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:34:06,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:34:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:34:06,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:34:06,353 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-09-26 21:34:06,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:06,401 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-09-26 21:34:06,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:34:06,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-26 21:34:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:06,402 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:34:06,402 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:34:06,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:34:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:34:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:34:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:34:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-26 21:34:06,406 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-09-26 21:34:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:06,406 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-26 21:34:06,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:34:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-26 21:34:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:34:06,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:06,407 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-09-26 21:34:06,408 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:06,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:06,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-09-26 21:34:06,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:06,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:06,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:06,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:06,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:06,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:06,516 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 21:34:06,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:06,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:34:06,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:06,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:06,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:06,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:34:06,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:34:06,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:34:06,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:34:06,570 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-09-26 21:34:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:06,607 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-26 21:34:06,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:34:06,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-26 21:34:06,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:06,613 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:34:06,613 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:34:06,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:34:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:34:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:34:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:34:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-09-26 21:34:06,617 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-09-26 21:34:06,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:06,617 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-09-26 21:34:06,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:34:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-09-26 21:34:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:34:06,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:06,618 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-09-26 21:34:06,619 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:06,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-09-26 21:34:06,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:06,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:06,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:06,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:06,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:06,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:06,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:06,887 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:06,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:06,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:06,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:06,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:06,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:34:06,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:34:06,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:34:06,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:34:06,945 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-09-26 21:34:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:07,053 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-09-26 21:34:07,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:34:07,053 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-09-26 21:34:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:07,054 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:34:07,054 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:34:07,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:34:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:34:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-09-26 21:34:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:34:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-26 21:34:07,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-26 21:34:07,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:07,059 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-26 21:34:07,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:34:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-26 21:34:07,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:34:07,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:07,060 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-26 21:34:07,060 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:07,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:07,060 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-09-26 21:34:07,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:07,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:07,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:07,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:07,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:07,146 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 21:34:07,155 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:07,187 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:34:07,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:07,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:07,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:07,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:34:07,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:34:07,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:34:07,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:34:07,222 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-09-26 21:34:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:07,305 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-09-26 21:34:07,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:34:07,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-26 21:34:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:07,306 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:34:07,306 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:34:07,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:34:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:34:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:34:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:34:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-26 21:34:07,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-09-26 21:34:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:07,310 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-26 21:34:07,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:34:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-26 21:34:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:34:07,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:07,311 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-09-26 21:34:07,311 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:07,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-09-26 21:34:07,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:07,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:07,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:07,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:07,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:07,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:07,406 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:07,416 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:34:07,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:07,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:07,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:07,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:34:07,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:34:07,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:34:07,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:34:07,448 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-09-26 21:34:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:07,490 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-09-26 21:34:07,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:34:07,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-26 21:34:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:07,492 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:34:07,492 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:34:07,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:34:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:34:07,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:34:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:34:07,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-09-26 21:34:07,497 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-09-26 21:34:07,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:07,497 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-09-26 21:34:07,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:34:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-09-26 21:34:07,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:34:07,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:07,498 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-09-26 21:34:07,499 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:07,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:07,499 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-09-26 21:34:07,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:07,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:07,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:07,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:07,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:07,653 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 21:34:07,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:07,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:07,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:07,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:34:07,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:34:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:34:07,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:34:07,728 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-09-26 21:34:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:07,879 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-26 21:34:07,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:34:07,879 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-09-26 21:34:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:07,880 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:34:07,880 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:34:07,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:34:07,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:34:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-26 21:34:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:34:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-09-26 21:34:07,885 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-09-26 21:34:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:07,885 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-09-26 21:34:07,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:34:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-09-26 21:34:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:34:07,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:07,886 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-26 21:34:07,887 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:07,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-09-26 21:34:07,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:07,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:07,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:07,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:08,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:08,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:08,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:08,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:08,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:08,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:08,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:08,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:34:08,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:34:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:34:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:34:08,114 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-09-26 21:34:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:08,207 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-09-26 21:34:08,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:34:08,207 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:34:08,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:08,208 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:34:08,209 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:34:08,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:34:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:34:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:34:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:34:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-26 21:34:08,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-09-26 21:34:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:08,213 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-26 21:34:08,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:34:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-26 21:34:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:34:08,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:08,214 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-09-26 21:34:08,215 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:08,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:08,215 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-09-26 21:34:08,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:08,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:08,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:08,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:08,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:08,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:08,290 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 21:34:08,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:08,313 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:34:08,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:08,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:08,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:08,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:34:08,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:34:08,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:34:08,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:34:08,344 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-26 21:34:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:08,385 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-26 21:34:08,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:34:08,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:34:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:08,387 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:34:08,387 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:34:08,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:34:08,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:34:08,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-26 21:34:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:34:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-09-26 21:34:08,391 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-09-26 21:34:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:08,391 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-09-26 21:34:08,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:34:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-09-26 21:34:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:34:08,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:08,393 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-09-26 21:34:08,393 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:08,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:08,393 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-09-26 21:34:08,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:08,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:08,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:08,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:08,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:08,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:08,561 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 21:34:08,569 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:08,594 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:08,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:08,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:08,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:08,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:34:08,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:34:08,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:34:08,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:34:08,693 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-09-26 21:34:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:08,915 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-09-26 21:34:08,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:34:08,916 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-09-26 21:34:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:08,917 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:34:08,917 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:34:08,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:34:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:34:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-09-26 21:34:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:34:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-26 21:34:08,922 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-09-26 21:34:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:08,922 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-26 21:34:08,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:34:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-26 21:34:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:34:08,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:08,923 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-26 21:34:08,924 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:08,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-09-26 21:34:08,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:08,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:08,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:08,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:08,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:09,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:09,027 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 21:34:09,060 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:09,087 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-26 21:34:09,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:09,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:09,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:09,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:34:09,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:34:09,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:34:09,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:34:09,118 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-09-26 21:34:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:09,222 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-09-26 21:34:09,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:34:09,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-26 21:34:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:09,223 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:34:09,223 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:34:09,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:34:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:34:09,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:34:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:34:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-26 21:34:09,227 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-09-26 21:34:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:09,227 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-26 21:34:09,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:34:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-26 21:34:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:34:09,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:09,228 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-09-26 21:34:09,228 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:09,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-09-26 21:34:09,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:09,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:09,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:09,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:09,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:09,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:09,342 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 21:34:09,350 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:09,360 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-26 21:34:09,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:09,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:09,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:09,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:34:09,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:34:09,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:34:09,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:34:09,395 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-09-26 21:34:09,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:09,438 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-09-26 21:34:09,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:34:09,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-26 21:34:09,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:09,440 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:34:09,440 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:34:09,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:34:09,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:34:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:34:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:34:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-09-26 21:34:09,444 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-09-26 21:34:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:09,444 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-09-26 21:34:09,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:34:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-09-26 21:34:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:09,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:09,445 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-09-26 21:34:09,445 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:09,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:09,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-09-26 21:34:09,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:09,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:09,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:09,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:09,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:09,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:09,615 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 21:34:09,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:09,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:09,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:09,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:34:09,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:34:09,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:34:09,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:34:09,707 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-09-26 21:34:09,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:09,993 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-26 21:34:09,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:34:09,996 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-09-26 21:34:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:09,996 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:34:09,997 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:34:09,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:34:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:34:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-26 21:34:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:34:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-09-26 21:34:10,004 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-09-26 21:34:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:10,004 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-09-26 21:34:10,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:34:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-09-26 21:34:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:34:10,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:10,005 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-26 21:34:10,005 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:10,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:10,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-09-26 21:34:10,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:10,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:10,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:10,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:10,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:10,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:10,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:10,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:10,305 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:10,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:10,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:10,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:10,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:10,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:10,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:10,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:10,358 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-09-26 21:34:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:10,653 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-09-26 21:34:10,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:10,654 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-26 21:34:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:10,654 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:34:10,655 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:34:10,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:34:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:34:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:34:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-26 21:34:10,659 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-09-26 21:34:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:10,659 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-26 21:34:10,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-26 21:34:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:34:10,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:10,660 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-09-26 21:34:10,661 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:10,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:10,661 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-09-26 21:34:10,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:10,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:10,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:10,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:10,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:10,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:10,942 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 21:34:10,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:11,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-26 21:34:11,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:11,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:11,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:11,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:11,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:11,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:11,050 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-09-26 21:34:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:11,099 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-26 21:34:11,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:11,099 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-26 21:34:11,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:11,100 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:34:11,100 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:34:11,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 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 21:34:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:34:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:34:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:34:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-09-26 21:34:11,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-09-26 21:34:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:11,105 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-09-26 21:34:11,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-09-26 21:34:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:34:11,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:11,105 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-09-26 21:34:11,106 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:11,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:11,106 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-09-26 21:34:11,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:11,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:11,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:11,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:11,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:11,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:11,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:11,333 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:11,352 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:11,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:11,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:11,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:11,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:34:11,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:11,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:11,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:11,445 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-09-26 21:34:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:11,592 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-09-26 21:34:11,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:11,593 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-09-26 21:34:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:11,594 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:34:11,594 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:34:11,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:34:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-09-26 21:34:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:34:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-26 21:34:11,600 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-09-26 21:34:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:11,601 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-26 21:34:11,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-26 21:34:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:34:11,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:11,602 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-26 21:34:11,602 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:11,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:11,602 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-09-26 21:34:11,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:11,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:11,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:11,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:11,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:11,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:11,841 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 21:34:11,848 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:11,890 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:34:11,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:11,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:11,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:11,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:34:11,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:34:11,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:34:11,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:34:11,925 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-09-26 21:34:12,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:12,001 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-09-26 21:34:12,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:34:12,002 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-26 21:34:12,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:12,002 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:34:12,002 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:34:12,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:34:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:34:12,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:34:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:34:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-26 21:34:12,007 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-09-26 21:34:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:12,007 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-26 21:34:12,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:34:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-26 21:34:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:34:12,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:12,008 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-09-26 21:34:12,008 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:12,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:12,009 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-09-26 21:34:12,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:12,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:12,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:12,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:12,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:12,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:12,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:12,284 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:12,302 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:34:12,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:12,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:12,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:12,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:34:12,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:34:12,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:34:12,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:34:12,336 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-09-26 21:34:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:12,372 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-09-26 21:34:12,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:34:12,372 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-26 21:34:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:12,373 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:34:12,373 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:34:12,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:34:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:34:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-26 21:34:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:34:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-09-26 21:34:12,377 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-09-26 21:34:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:12,378 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-09-26 21:34:12,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:34:12,378 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-09-26 21:34:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:34:12,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:12,378 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-09-26 21:34:12,379 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:12,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:12,379 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-09-26 21:34:12,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:12,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:12,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:12,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:12,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:12,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:12,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:12,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:12,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:12,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:12,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:12,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:34:12,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:34:12,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:34:12,854 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-09-26 21:34:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:13,053 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-26 21:34:13,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:34:13,054 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-09-26 21:34:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:13,055 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:34:13,055 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:34:13,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:34:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:34:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-26 21:34:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:34:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-26 21:34:13,059 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-09-26 21:34:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:13,059 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-26 21:34:13,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:34:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-26 21:34:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:34:13,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:13,060 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-26 21:34:13,061 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:13,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:13,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-09-26 21:34:13,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:13,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:13,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:13,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:13,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:13,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:13,250 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 21:34:13,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:13,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:13,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:13,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:13,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:13,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:34:13,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:34:13,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:34:13,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:34:13,313 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-09-26 21:34:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:13,372 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-09-26 21:34:13,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:34:13,372 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-26 21:34:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:13,373 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:34:13,373 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:34:13,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:34:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:34:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:34:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:34:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-26 21:34:13,378 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-09-26 21:34:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:13,379 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-26 21:34:13,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:34:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-26 21:34:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:34:13,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:13,380 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-09-26 21:34:13,380 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:13,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:13,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-09-26 21:34:13,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:13,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:13,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:13,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:13,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:13,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:13,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:13,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:13,990 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:34:13,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:13,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:14,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:14,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:34:14,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:34:14,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:34:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:34:14,031 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-09-26 21:34:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:14,076 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-26 21:34:14,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:34:14,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-26 21:34:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:14,077 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:34:14,077 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:34:14,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:34:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:34:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:34:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:34:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-09-26 21:34:14,082 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-09-26 21:34:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:14,082 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-09-26 21:34:14,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:34:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-09-26 21:34:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:34:14,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:14,083 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-09-26 21:34:14,083 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:14,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-09-26 21:34:14,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:14,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:14,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:14,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:14,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:14,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:14,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:14,372 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:14,387 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:14,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:14,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:14,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:14,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:34:14,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:34:14,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:34:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:34:14,418 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-09-26 21:34:14,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:14,617 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-09-26 21:34:14,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:34:14,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-09-26 21:34:14,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:14,618 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:34:14,618 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:34:14,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:34:14,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:34:14,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-09-26 21:34:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:34:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-26 21:34:14,623 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-09-26 21:34:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:14,623 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-26 21:34:14,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:34:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-26 21:34:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:34:14,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:14,624 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-26 21:34:14,624 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:14,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:14,625 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-09-26 21:34:14,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:14,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:14,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:14,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:14,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:14,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:14,815 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 21:34:14,824 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:14,842 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:34:14,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:14,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:14,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:14,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:34:14,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:34:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:34:14,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:34:14,880 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-09-26 21:34:15,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:15,000 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-09-26 21:34:15,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:34:15,000 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-26 21:34:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:15,001 INFO L225 Difference]: With dead ends: 42 [2018-09-26 21:34:15,001 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:34:15,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:34:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:34:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:34:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:34:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-26 21:34:15,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-09-26 21:34:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:15,008 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-26 21:34:15,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:34:15,009 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-26 21:34:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:34:15,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:15,009 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-09-26 21:34:15,010 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:15,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:15,010 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-09-26 21:34:15,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:15,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:15,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:15,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:15,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:15,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:15,207 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 21:34:15,221 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:15,241 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:34:15,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:15,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:15,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:15,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:34:15,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:34:15,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:34:15,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:34:15,288 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-09-26 21:34:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:15,391 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-09-26 21:34:15,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:34:15,392 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-26 21:34:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:15,393 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:34:15,393 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:34:15,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 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 21:34:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:34:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 21:34:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:34:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-09-26 21:34:15,397 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-09-26 21:34:15,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:15,397 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-09-26 21:34:15,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:34:15,397 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-09-26 21:34:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:34:15,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:15,399 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-09-26 21:34:15,399 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:15,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:15,399 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-09-26 21:34:15,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:15,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:15,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:15,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:15,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:15,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:15,998 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 21:34:16,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:16,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:16,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:16,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:34:16,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:34:16,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:34:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:34:16,068 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-09-26 21:34:16,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:16,357 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-26 21:34:16,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:34:16,357 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-09-26 21:34:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:16,357 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:34:16,357 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:34:16,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:34:16,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:34:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-26 21:34:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:34:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-26 21:34:16,364 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-09-26 21:34:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:16,364 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-26 21:34:16,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:34:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-26 21:34:16,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:34:16,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:16,369 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-26 21:34:16,369 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:16,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:16,370 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-09-26 21:34:16,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:16,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:16,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:16,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:16,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:16,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:16,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:16,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:16,751 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:16,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:16,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:16,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:16,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:34:16,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:34:16,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:34:16,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:34:16,781 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-09-26 21:34:16,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:16,881 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-09-26 21:34:16,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:34:16,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-26 21:34:16,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:16,882 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:34:16,883 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:34:16,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:34:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:34:16,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:34:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:34:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-26 21:34:16,887 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-09-26 21:34:16,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:16,887 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-26 21:34:16,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:34:16,888 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-26 21:34:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:34:16,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:16,888 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-09-26 21:34:16,888 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:16,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:16,889 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-09-26 21:34:16,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:16,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:16,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:16,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:16,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:17,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:17,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:17,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:17,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:34:17,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:17,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:17,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:17,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:34:17,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:34:17,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:34:17,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:34:17,221 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-09-26 21:34:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:17,520 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-26 21:34:17,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:34:17,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-26 21:34:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:17,521 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:34:17,521 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:34:17,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:34:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:34:17,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-26 21:34:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:34:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-09-26 21:34:17,528 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-09-26 21:34:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:17,528 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-09-26 21:34:17,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:34:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-09-26 21:34:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:34:17,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:17,529 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-09-26 21:34:17,529 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:17,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:17,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-09-26 21:34:17,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:17,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:17,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:17,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:17,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:18,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:18,052 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:18,068 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:18,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:18,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:18,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:34:18,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:34:18,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:34:18,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:34:18,107 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-09-26 21:34:18,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:18,350 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-09-26 21:34:18,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:34:18,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-09-26 21:34:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:18,351 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:34:18,351 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:34:18,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:34:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:34:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-09-26 21:34:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-09-26 21:34:18,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-09-26 21:34:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:18,355 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-09-26 21:34:18,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:34:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-09-26 21:34:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:34:18,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:18,356 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-26 21:34:18,356 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:18,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:18,357 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-09-26 21:34:18,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:18,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:18,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:18,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:18,514 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 21:34:18,523 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:18,544 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:34:18,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:18,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:18,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:34:18,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:34:18,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:34:18,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:34:18,575 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-09-26 21:34:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:18,647 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-09-26 21:34:18,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:34:18,647 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-26 21:34:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:18,648 INFO L225 Difference]: With dead ends: 48 [2018-09-26 21:34:18,648 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:34:18,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:34:18,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:34:18,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:34:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:34:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-26 21:34:18,651 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-09-26 21:34:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:18,651 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-26 21:34:18,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:34:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-26 21:34:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:34:18,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:18,652 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-09-26 21:34:18,653 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:18,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-09-26 21:34:18,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:18,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:18,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:18,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:18,839 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 21:34:18,852 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:18,873 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:34:18,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:18,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:18,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:34:18,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:34:18,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:34:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:34:18,903 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-09-26 21:34:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:18,951 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-09-26 21:34:18,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:34:18,951 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-26 21:34:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:18,952 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:34:18,952 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:34:18,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:34:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:34:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:34:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-09-26 21:34:18,956 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-09-26 21:34:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:18,956 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-09-26 21:34:18,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:34:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-09-26 21:34:18,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:34:18,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:18,956 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-09-26 21:34:18,957 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:18,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-09-26 21:34:18,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:18,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:18,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:18,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:19,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:19,221 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 21:34:19,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:19,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:19,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:19,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:34:19,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:34:19,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:34:19,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:34:19,280 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-09-26 21:34:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:19,546 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-26 21:34:19,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:34:19,546 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-09-26 21:34:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:19,547 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:34:19,547 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:34:19,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:34:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:34:19,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:34:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-09-26 21:34:19,551 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-09-26 21:34:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:19,552 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-09-26 21:34:19,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:34:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-09-26 21:34:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:34:19,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:19,552 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-26 21:34:19,553 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:19,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:19,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-09-26 21:34:19,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:19,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:19,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:19,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:19,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:19,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:19,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:19,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:19,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:19,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:19,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:19,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:19,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:34:19,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:34:19,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:34:19,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:34:19,946 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-09-26 21:34:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:20,069 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-09-26 21:34:20,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:34:20,069 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-26 21:34:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:20,070 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:34:20,070 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:34:20,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:34:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:34:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:34:20,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:34:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-26 21:34:20,074 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-09-26 21:34:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:20,075 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-26 21:34:20,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:34:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-26 21:34:20,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:34:20,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:20,075 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-09-26 21:34:20,076 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:20,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-09-26 21:34:20,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:20,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:20,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:20,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:20,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:20,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:20,464 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 21:34:20,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:20,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:34:20,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:20,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:20,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:20,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:34:20,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:34:20,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:34:20,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:34:20,535 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-09-26 21:34:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:20,667 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-26 21:34:20,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:34:20,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-26 21:34:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:20,668 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:34:20,668 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:34:20,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:34:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:34:20,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-26 21:34:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-09-26 21:34:20,671 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-09-26 21:34:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:20,671 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-09-26 21:34:20,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:34:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-09-26 21:34:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:34:20,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:20,672 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-09-26 21:34:20,672 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:20,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:20,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-09-26 21:34:20,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:20,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:20,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:20,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:20,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:20,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:20,901 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 21:34:20,908 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:20,929 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:20,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:20,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:20,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:20,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:34:20,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:34:20,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:34:20,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:34:20,961 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-09-26 21:34:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:21,283 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-09-26 21:34:21,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:34:21,283 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-09-26 21:34:21,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:21,284 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:34:21,284 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:34:21,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:34:21,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:34:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-09-26 21:34:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:34:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-26 21:34:21,288 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-09-26 21:34:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:21,289 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-26 21:34:21,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:34:21,289 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-26 21:34:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:34:21,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:21,289 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-26 21:34:21,290 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:21,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:21,290 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-09-26 21:34:21,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:21,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:21,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:21,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:21,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:21,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:21,526 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 21:34:21,533 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:21,564 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:34:21,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:21,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:21,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:21,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:34:21,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:34:21,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:34:21,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:34:21,594 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-09-26 21:34:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:21,772 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-09-26 21:34:21,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:34:21,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-26 21:34:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:21,773 INFO L225 Difference]: With dead ends: 54 [2018-09-26 21:34:21,773 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:34:21,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:34:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:34:21,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:34:21,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:34:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-26 21:34:21,776 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-09-26 21:34:21,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:21,776 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-26 21:34:21,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:34:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-26 21:34:21,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:34:21,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:21,777 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-09-26 21:34:21,777 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:21,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:21,777 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-09-26 21:34:21,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:21,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:21,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:21,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:21,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:21,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:21,945 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 21:34:21,953 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:21,977 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:34:21,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:21,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:22,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:22,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:34:22,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:34:22,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:34:22,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:34:22,008 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-09-26 21:34:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:22,077 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-09-26 21:34:22,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:34:22,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-26 21:34:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:22,078 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:34:22,078 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:34:22,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 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 21:34:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:34:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:34:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:34:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-09-26 21:34:22,082 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-09-26 21:34:22,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:22,083 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-09-26 21:34:22,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:34:22,083 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-09-26 21:34:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:34:22,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:22,083 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-09-26 21:34:22,084 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:22,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:22,084 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-09-26 21:34:22,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:22,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:22,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:22,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:22,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:22,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:22,416 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 21:34:22,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:22,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:22,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:22,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:34:22,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:34:22,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:34:22,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:34:22,481 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-09-26 21:34:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:22,940 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-26 21:34:22,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:34:22,940 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-09-26 21:34:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:22,941 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:34:22,941 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:34:22,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:34:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:34:22,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-09-26 21:34:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:34:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-09-26 21:34:22,946 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-09-26 21:34:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:22,946 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-09-26 21:34:22,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:34:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-09-26 21:34:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:34:22,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:22,947 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-26 21:34:22,947 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:22,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-09-26 21:34:22,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:22,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:22,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:22,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:22,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:23,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:23,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:23,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:23,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:23,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:23,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:23,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:23,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:34:23,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:34:23,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:34:23,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:34:23,326 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-09-26 21:34:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:23,404 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-09-26 21:34:23,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:34:23,404 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-26 21:34:23,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:23,405 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:34:23,405 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:34:23,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:34:23,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:34:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:34:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:34:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-26 21:34:23,409 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-09-26 21:34:23,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:23,409 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-26 21:34:23,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:34:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-26 21:34:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:34:23,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:23,409 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-09-26 21:34:23,409 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:23,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-09-26 21:34:23,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:23,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:23,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:23,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:23,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:23,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:23,622 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 21:34:23,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:23,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:34:23,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:23,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:23,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:23,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:34:23,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:34:23,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:34:23,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:34:23,681 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-09-26 21:34:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:23,739 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-26 21:34:23,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:34:23,739 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-26 21:34:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:23,740 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:34:23,740 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:34:23,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:34:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:34:23,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-26 21:34:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:34:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-09-26 21:34:23,745 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-09-26 21:34:23,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:23,745 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-09-26 21:34:23,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:34:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-09-26 21:34:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:34:23,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:23,746 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-09-26 21:34:23,746 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:23,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:23,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-09-26 21:34:23,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:23,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:23,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:23,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:23,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:24,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:24,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:24,095 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:24,115 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:24,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:24,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:24,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:24,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:34:24,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:34:24,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:34:24,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:34:24,145 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-09-26 21:34:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:24,842 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-09-26 21:34:24,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:34:24,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-09-26 21:34:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:24,843 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:34:24,843 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:34:24,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:34:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:34:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-09-26 21:34:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:34:24,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-26 21:34:24,848 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-09-26 21:34:24,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:24,848 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-26 21:34:24,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:34:24,848 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-26 21:34:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:34:24,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:24,849 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-26 21:34:24,849 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:24,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:24,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-09-26 21:34:24,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:24,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:24,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:24,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:24,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:25,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:25,597 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 21:34:25,604 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:25,636 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:34:25,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:25,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:25,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:25,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:34:25,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:34:25,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:34:25,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:34:25,681 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-09-26 21:34:26,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:26,251 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-09-26 21:34:26,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:34:26,252 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-26 21:34:26,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:26,252 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:34:26,252 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:34:26,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:34:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:34:26,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:34:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:34:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-26 21:34:26,254 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-09-26 21:34:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:26,255 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-26 21:34:26,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:34:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-26 21:34:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:34:26,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:26,255 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-09-26 21:34:26,255 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:26,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:26,256 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-09-26 21:34:26,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:26,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:26,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:26,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:26,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:26,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:26,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:26,475 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:26,500 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:34:26,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:26,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:26,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:26,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:34:26,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:34:26,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:34:26,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:34:26,530 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-09-26 21:34:26,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:26,634 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-09-26 21:34:26,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:34:26,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-26 21:34:26,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:26,635 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:34:26,635 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:34:26,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:34:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:34:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:34:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:34:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-09-26 21:34:26,638 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-09-26 21:34:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:26,638 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-09-26 21:34:26,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:34:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-09-26 21:34:26,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:34:26,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:26,639 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-09-26 21:34:26,639 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:26,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:26,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-09-26 21:34:26,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:26,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:26,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:26,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:26,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:27,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:27,157 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 21:34:27,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:27,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:27,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:27,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:34:27,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:34:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:34:27,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:34:27,224 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-09-26 21:34:27,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:27,649 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-26 21:34:27,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:34:27,649 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-09-26 21:34:27,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:27,650 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:34:27,650 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:34:27,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:34:27,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:34:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-09-26 21:34:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:34:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-09-26 21:34:27,654 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-09-26 21:34:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:27,654 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-09-26 21:34:27,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:34:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-09-26 21:34:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:34:27,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:27,655 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-26 21:34:27,655 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:27,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:27,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-09-26 21:34:27,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:27,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:27,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:27,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:27,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:27,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:27,971 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 21:34:27,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:28,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:28,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:28,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:28,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:28,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:34:28,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:34:28,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:34:28,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:34:28,040 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-09-26 21:34:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:28,150 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-09-26 21:34:28,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:34:28,151 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-26 21:34:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:28,152 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:34:28,152 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:34:28,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:34:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:34:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:34:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:34:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-26 21:34:28,156 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-09-26 21:34:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:28,157 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-26 21:34:28,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:34:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-26 21:34:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:34:28,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:28,158 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-09-26 21:34:28,158 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:28,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:28,158 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-09-26 21:34:28,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:28,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:28,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:28,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:28,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:28,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:28,680 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 21:34:28,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:28,751 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-26 21:34:28,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:28,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:28,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:28,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:34:28,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:34:28,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:34:28,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:34:28,793 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-09-26 21:34:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:28,877 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-26 21:34:28,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:34:28,877 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-26 21:34:28,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:28,878 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:34:28,878 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:34:28,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:34:28,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:34:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-26 21:34:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:34:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-09-26 21:34:28,883 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-09-26 21:34:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:28,883 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-09-26 21:34:28,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:34:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-09-26 21:34:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:34:28,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:28,884 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-09-26 21:34:28,884 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:28,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-09-26 21:34:28,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:28,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:28,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:28,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:28,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:29,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:29,308 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 21:34:29,318 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:29,340 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:29,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:29,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:29,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:29,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:34:29,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:34:29,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:34:29,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:34:29,405 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-09-26 21:34:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:29,884 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-09-26 21:34:29,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:34:29,885 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-09-26 21:34:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:29,885 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:34:29,885 INFO L226 Difference]: Without dead ends: 62 [2018-09-26 21:34:29,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:34:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-26 21:34:29,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-09-26 21:34:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:34:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-09-26 21:34:29,891 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-09-26 21:34:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:29,891 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-09-26 21:34:29,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:34:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-09-26 21:34:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:34:29,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:29,892 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-26 21:34:29,893 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:29,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:29,893 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-09-26 21:34:29,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:29,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:29,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:29,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:29,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:30,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:30,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:30,800 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:30,829 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-09-26 21:34:30,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:30,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:30,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:30,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:34:30,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:34:30,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:34:30,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:34:30,862 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-09-26 21:34:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:30,983 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-09-26 21:34:30,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:34:30,983 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-26 21:34:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:30,984 INFO L225 Difference]: With dead ends: 66 [2018-09-26 21:34:30,984 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:34:30,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:34:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:34:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:34:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:34:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-26 21:34:30,988 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-09-26 21:34:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:30,989 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-26 21:34:30,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:34:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-26 21:34:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:34:30,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:30,989 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-09-26 21:34:30,990 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:30,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:30,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-09-26 21:34:30,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:30,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:30,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:30,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:30,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:31,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:31,245 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 21:34:31,252 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:31,287 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-26 21:34:31,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:31,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:31,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:31,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:34:31,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:34:31,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:34:31,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:34:31,320 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-09-26 21:34:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:31,378 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-09-26 21:34:31,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:34:31,379 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-26 21:34:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:31,380 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:34:31,380 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:34:31,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:34:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:34:31,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-26 21:34:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:34:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-09-26 21:34:31,384 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-09-26 21:34:31,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:31,384 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-09-26 21:34:31,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:34:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-09-26 21:34:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:34:31,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:31,385 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-09-26 21:34:31,385 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:31,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-09-26 21:34:31,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:31,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:31,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:31,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:31,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:32,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:32,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:32,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:32,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:32,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:32,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:34:32,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:34:32,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:34:32,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:34:32,143 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-09-26 21:34:32,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:32,662 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-26 21:34:32,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:34:32,662 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-09-26 21:34:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:32,663 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:34:32,663 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:34:32,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:34:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:34:32,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-09-26 21:34:32,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:34:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-26 21:34:32,669 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-09-26 21:34:32,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:32,669 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-26 21:34:32,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:34:32,669 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-26 21:34:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:34:32,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:32,670 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-26 21:34:32,670 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:32,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-09-26 21:34:32,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:32,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:32,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:32,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:32,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:33,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:33,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:33,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:33,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:33,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:33,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:33,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:33,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:34:33,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:34:33,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:34:33,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:34:33,559 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-09-26 21:34:33,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:33,698 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-09-26 21:34:33,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:34:33,699 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-26 21:34:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:33,699 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:34:33,700 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:34:33,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:34:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:34:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:34:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:34:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-26 21:34:33,704 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-09-26 21:34:33,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:33,704 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-26 21:34:33,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:34:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-26 21:34:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:34:33,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:33,705 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-09-26 21:34:33,705 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:33,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:33,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-09-26 21:34:33,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:33,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:33,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:33,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:33,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:33,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:33,971 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 21:34:33,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:34,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-26 21:34:34,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:34,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:34,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:34,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:34:34,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:34:34,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:34:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:34:34,043 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-09-26 21:34:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:34,104 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-26 21:34:34,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:34:34,105 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-26 21:34:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:34,105 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:34:34,106 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:34:34,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:34:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:34:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:34:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:34:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-09-26 21:34:34,110 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-09-26 21:34:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:34,110 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-09-26 21:34:34,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:34:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-09-26 21:34:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-26 21:34:34,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:34,111 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-09-26 21:34:34,111 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:34,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:34,111 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-09-26 21:34:34,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:34,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:34,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:34,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:34,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:34,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:34,526 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 21:34:34,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:34,572 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:34,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:34,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:34,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:34,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:34:34,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:34:34,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:34:34,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:34:34,610 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-09-26 21:34:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:35,203 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-09-26 21:34:35,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:34:35,204 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-09-26 21:34:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:35,205 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:34:35,205 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:34:35,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:34:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:34:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-09-26 21:34:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-26 21:34:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-09-26 21:34:35,210 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-09-26 21:34:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:35,210 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-09-26 21:34:35,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:34:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-09-26 21:34:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:34:35,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:35,211 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-26 21:34:35,211 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:35,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:35,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-09-26 21:34:35,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:35,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:35,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:35,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:35,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:35,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:35,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:35,968 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:36,003 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:34:36,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:36,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:36,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:36,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:34:36,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:34:36,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:34:36,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:34:36,046 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-09-26 21:34:36,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:36,246 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-09-26 21:34:36,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:34:36,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-26 21:34:36,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:36,247 INFO L225 Difference]: With dead ends: 72 [2018-09-26 21:34:36,247 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:34:36,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:34:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:34:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:34:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:34:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-26 21:34:36,252 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-09-26 21:34:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:36,252 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-26 21:34:36,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:34:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-26 21:34:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:34:36,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:36,253 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-09-26 21:34:36,253 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:36,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:36,253 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-09-26 21:34:36,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:36,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:36,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:36,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:36,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:36,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:36,645 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 21:34:36,653 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:36,820 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-26 21:34:36,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:36,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:36,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:36,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:34:36,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:34:36,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:34:36,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:34:36,868 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-09-26 21:34:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:37,058 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-09-26 21:34:37,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:34:37,058 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-26 21:34:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:37,058 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:34:37,059 INFO L226 Difference]: Without dead ends: 48 [2018-09-26 21:34:37,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:34:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-26 21:34:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-26 21:34:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-26 21:34:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-09-26 21:34:37,062 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-09-26 21:34:37,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:37,062 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-09-26 21:34:37,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:34:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-09-26 21:34:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:34:37,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:37,063 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-09-26 21:34:37,063 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:37,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:37,063 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-09-26 21:34:37,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:37,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:37,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:37,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:37,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:37,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:37,436 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 21:34:37,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:37,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:37,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:37,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:34:37,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:34:37,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:34:37,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:34:37,509 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-09-26 21:34:38,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:38,146 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-26 21:34:38,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:34:38,146 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-09-26 21:34:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:38,147 INFO L225 Difference]: With dead ends: 74 [2018-09-26 21:34:38,147 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:34:38,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:34:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:34:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-09-26 21:34:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:34:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-26 21:34:38,151 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-09-26 21:34:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:38,152 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-26 21:34:38,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:34:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-26 21:34:38,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:34:38,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:38,152 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-26 21:34:38,153 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:38,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:38,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-09-26 21:34:38,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:38,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:38,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:38,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:38,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:38,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:38,387 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 21:34:38,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:38,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:38,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:38,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:38,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:38,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:34:38,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:34:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:34:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:34:38,457 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-09-26 21:34:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:38,591 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-09-26 21:34:38,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:34:38,592 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-26 21:34:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:38,593 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:34:38,593 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:34:38,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:34:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:34:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:34:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:34:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-26 21:34:38,598 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-09-26 21:34:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:38,598 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-26 21:34:38,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:34:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-26 21:34:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:34:38,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:38,599 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-09-26 21:34:38,599 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:38,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:38,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-09-26 21:34:38,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:38,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:38,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:38,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:38,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:39,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:39,238 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 21:34:39,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:39,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:34:39,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:39,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:39,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:39,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:34:39,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:34:39,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:34:39,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:34:39,320 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-09-26 21:34:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:39,394 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-26 21:34:39,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:34:39,395 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-26 21:34:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:39,395 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:34:39,396 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:34:39,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:34:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:34:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-26 21:34:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:34:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-09-26 21:34:39,400 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-09-26 21:34:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:39,400 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-09-26 21:34:39,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:34:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-09-26 21:34:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-26 21:34:39,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:39,400 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-09-26 21:34:39,400 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:39,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:39,401 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-09-26 21:34:39,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:39,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:39,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:39,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:39,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:39,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:39,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:39,751 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:39,780 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:39,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:39,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:39,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:39,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:34:39,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:34:39,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:34:39,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:34:39,813 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-09-26 21:34:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:40,483 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-09-26 21:34:40,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:34:40,483 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-09-26 21:34:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:40,484 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:34:40,484 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:34:40,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:34:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:34:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-09-26 21:34:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:34:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-26 21:34:40,490 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-09-26 21:34:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:40,490 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-26 21:34:40,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:34:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-26 21:34:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:34:40,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:40,491 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-26 21:34:40,491 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:40,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:40,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-09-26 21:34:40,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:40,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:40,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:40,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:40,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:40,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:40,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:40,839 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:40,891 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:34:40,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:40,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:40,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:40,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:34:40,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:34:40,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:34:40,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:34:40,923 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-09-26 21:34:41,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:41,078 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-09-26 21:34:41,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:34:41,078 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-26 21:34:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:41,079 INFO L225 Difference]: With dead ends: 78 [2018-09-26 21:34:41,079 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:34:41,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:34:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:34:41,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:34:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:34:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-26 21:34:41,083 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-09-26 21:34:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:41,084 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-26 21:34:41,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:34:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-26 21:34:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:34:41,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:41,084 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-09-26 21:34:41,084 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:41,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-09-26 21:34:41,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:41,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:41,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:41,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:41,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:41,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:41,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:41,370 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:41,405 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:34:41,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:41,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:41,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:41,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:34:41,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:34:41,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:34:41,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:34:41,439 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-09-26 21:34:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:41,603 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-09-26 21:34:41,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:34:41,604 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-26 21:34:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:41,604 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:34:41,605 INFO L226 Difference]: Without dead ends: 52 [2018-09-26 21:34:41,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:34:41,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-26 21:34:41,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-26 21:34:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:34:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-09-26 21:34:41,609 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-09-26 21:34:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:41,609 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-09-26 21:34:41,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:34:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-09-26 21:34:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-26 21:34:41,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:41,610 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-09-26 21:34:41,610 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:41,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:41,610 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-09-26 21:34:41,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:41,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:41,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:41,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:41,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:42,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:42,530 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 21:34:42,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:42,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:42,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:42,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:34:42,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:34:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:34:42,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:34:42,604 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-09-26 21:34:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:43,345 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-26 21:34:43,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:34:43,346 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-09-26 21:34:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:43,346 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:34:43,347 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:34:43,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:34:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:34:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-09-26 21:34:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:34:43,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-09-26 21:34:43,351 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-09-26 21:34:43,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:43,351 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-09-26 21:34:43,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:34:43,351 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-09-26 21:34:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:34:43,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:43,352 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-26 21:34:43,352 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:43,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-09-26 21:34:43,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:43,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:43,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:43,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:43,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:43,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:43,620 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 21:34:43,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:43,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:43,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:43,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:43,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:43,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:34:43,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:34:43,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:34:43,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:34:43,699 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-09-26 21:34:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:43,946 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-09-26 21:34:43,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:34:43,946 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-26 21:34:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:43,947 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:34:43,947 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:34:43,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:34:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:34:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:34:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:34:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-26 21:34:43,951 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-09-26 21:34:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:43,951 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-26 21:34:43,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:34:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-26 21:34:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:34:43,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:43,951 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-09-26 21:34:43,952 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:43,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-09-26 21:34:43,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:43,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:43,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:43,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:43,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:44,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:44,391 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 21:34:44,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:44,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-09-26 21:34:44,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:44,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:44,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:44,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:34:44,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:34:44,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:34:44,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:34:44,464 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-09-26 21:34:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:44,557 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-26 21:34:44,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:34:44,559 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-26 21:34:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:44,560 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:34:44,560 INFO L226 Difference]: Without dead ends: 54 [2018-09-26 21:34:44,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:34:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-26 21:34:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-26 21:34:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:34:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-09-26 21:34:44,563 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-09-26 21:34:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:44,563 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-09-26 21:34:44,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:34:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-09-26 21:34:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:34:44,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:44,564 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-09-26 21:34:44,564 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:44,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:44,564 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-09-26 21:34:44,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:44,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:44,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:44,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:44,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:45,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:45,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:45,175 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:45,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:45,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:45,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:45,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:45,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:34:45,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:34:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:34:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:34:45,280 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-09-26 21:34:46,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:46,125 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-09-26 21:34:46,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:34:46,125 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-09-26 21:34:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:46,126 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:34:46,126 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:34:46,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:34:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:34:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-09-26 21:34:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:34:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-26 21:34:46,131 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-09-26 21:34:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:46,132 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-26 21:34:46,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:34:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-26 21:34:46,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:34:46,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:46,132 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-26 21:34:46,133 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:46,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-09-26 21:34:46,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:46,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:46,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:46,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:46,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:46,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:46,599 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 21:34:46,606 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:46,650 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-26 21:34:46,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:46,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:46,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:46,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:34:46,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:34:46,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:34:46,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:34:46,706 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-09-26 21:34:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:47,211 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-09-26 21:34:47,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:34:47,212 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-26 21:34:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:47,213 INFO L225 Difference]: With dead ends: 84 [2018-09-26 21:34:47,213 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:34:47,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:34:47,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:34:47,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:34:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:34:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-26 21:34:47,217 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-09-26 21:34:47,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:47,217 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-26 21:34:47,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:34:47,217 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-26 21:34:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:34:47,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:47,218 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-09-26 21:34:47,218 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:47,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:47,218 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-09-26 21:34:47,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:47,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:47,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:47,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:47,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:48,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:48,650 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 21:34:48,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:48,695 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-26 21:34:48,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:48,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:48,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:48,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:34:48,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:34:48,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:34:48,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:34:48,742 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-09-26 21:34:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:48,948 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-09-26 21:34:48,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:34:48,948 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-26 21:34:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:48,949 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:34:48,949 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:34:48,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:34:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:34:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:34:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:34:48,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-09-26 21:34:48,955 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-09-26 21:34:48,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:48,955 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-09-26 21:34:48,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:34:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-09-26 21:34:48,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-26 21:34:48,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:48,956 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-09-26 21:34:48,956 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:48,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:48,956 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-09-26 21:34:48,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:48,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:48,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:48,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:48,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:49,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:49,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:49,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:49,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:49,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:49,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:34:49,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:34:49,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:34:49,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:34:49,497 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-09-26 21:34:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:50,390 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-26 21:34:50,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:34:50,390 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-09-26 21:34:50,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:50,391 INFO L225 Difference]: With dead ends: 86 [2018-09-26 21:34:50,392 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:34:50,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:34:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:34:50,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-09-26 21:34:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-26 21:34:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-09-26 21:34:50,397 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-09-26 21:34:50,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:50,397 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-09-26 21:34:50,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:34:50,397 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-09-26 21:34:50,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:34:50,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:50,398 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-26 21:34:50,398 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:50,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:50,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-09-26 21:34:50,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:50,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:50,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:50,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:50,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:50,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:50,678 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 21:34:50,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:50,727 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:50,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:50,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:50,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:50,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:34:50,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:34:50,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:34:50,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:34:50,776 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-09-26 21:34:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:52,077 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-09-26 21:34:52,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:34:52,078 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-26 21:34:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:52,078 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:34:52,078 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:34:52,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:34:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:34:52,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:34:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:34:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-26 21:34:52,083 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-09-26 21:34:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:52,083 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-26 21:34:52,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:34:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-26 21:34:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:34:52,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:52,083 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-09-26 21:34:52,083 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:52,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:52,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-09-26 21:34:52,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:52,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:52,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:52,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:52,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:52,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:52,725 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 21:34:52,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:52,768 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-09-26 21:34:52,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:52,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:52,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:52,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:34:52,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:34:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:34:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:34:52,809 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-09-26 21:34:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:52,900 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-26 21:34:52,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:34:52,901 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-26 21:34:52,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:52,901 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:34:52,902 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:34:52,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:34:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:34:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-26 21:34:52,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-26 21:34:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-09-26 21:34:52,906 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-09-26 21:34:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:52,906 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-09-26 21:34:52,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:34:52,906 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-09-26 21:34:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-26 21:34:52,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:52,907 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-09-26 21:34:52,907 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:52,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-09-26 21:34:52,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:52,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:52,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:52,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:52,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:53,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:53,383 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 21:34:53,392 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:53,432 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:53,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:53,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:53,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:53,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:34:53,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:34:53,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:34:53,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:34:53,515 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-09-26 21:34:54,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:54,472 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-09-26 21:34:54,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:34:54,473 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-09-26 21:34:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:54,474 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:34:54,474 INFO L226 Difference]: Without dead ends: 86 [2018-09-26 21:34:54,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:34:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-26 21:34:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-09-26 21:34:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:34:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-26 21:34:54,481 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-09-26 21:34:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:54,481 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-26 21:34:54,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:34:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-26 21:34:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:34:54,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:54,482 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-26 21:34:54,483 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:54,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-09-26 21:34:54,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:54,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:54,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:54,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:54,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:54,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:54,997 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 21:34:55,018 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:55,059 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-09-26 21:34:55,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:55,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:55,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:55,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:34:55,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:34:55,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:34:55,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:34:55,092 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-09-26 21:34:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:55,300 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-09-26 21:34:55,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:34:55,301 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-26 21:34:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:55,302 INFO L225 Difference]: With dead ends: 90 [2018-09-26 21:34:55,302 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:34:55,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:34:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:34:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:34:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:34:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-26 21:34:55,308 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-09-26 21:34:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:55,308 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-26 21:34:55,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:34:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-26 21:34:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:34:55,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:55,309 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-09-26 21:34:55,309 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:55,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-09-26 21:34:55,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:55,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:55,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:55,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:55,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:55,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:55,678 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 21:34:55,685 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:55,722 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-09-26 21:34:55,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:55,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:55,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:55,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:34:55,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:34:55,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:34:55,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:34:55,755 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-09-26 21:34:55,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:55,855 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-09-26 21:34:55,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:34:55,855 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-26 21:34:55,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:55,856 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:34:55,856 INFO L226 Difference]: Without dead ends: 60 [2018-09-26 21:34:55,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:34:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-26 21:34:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-26 21:34:55,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:34:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-09-26 21:34:55,862 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-09-26 21:34:55,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:55,863 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-09-26 21:34:55,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:34:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-09-26 21:34:55,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-26 21:34:55,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:55,864 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-09-26 21:34:55,864 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:55,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:55,864 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-09-26 21:34:55,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:55,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:55,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:55,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:55,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:57,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:57,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:57,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:57,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:57,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:57,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:34:57,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:34:57,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:34:57,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:34:57,348 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-09-26 21:34:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:58,530 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-26 21:34:58,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:34:58,531 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-09-26 21:34:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:58,532 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:34:58,532 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:34:58,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:34:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:34:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-09-26 21:34:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-26 21:34:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-09-26 21:34:58,536 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-09-26 21:34:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:58,536 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-09-26 21:34:58,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:34:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-09-26 21:34:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:34:58,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:58,537 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-26 21:34:58,537 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:58,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:58,537 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-09-26 21:34:58,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:58,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:58,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:58,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:58,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:58,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:58,851 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 21:34:58,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:58,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:58,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:58,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:58,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:58,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:34:58,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:34:58,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:34:58,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:34:58,934 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-09-26 21:34:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:59,197 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-09-26 21:34:59,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:34:59,198 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-26 21:34:59,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:59,198 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:34:59,199 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:34:59,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:34:59,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:34:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:34:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:34:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-26 21:34:59,204 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-09-26 21:34:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:59,204 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-26 21:34:59,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:34:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-26 21:34:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:34:59,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:59,204 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-09-26 21:34:59,205 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:59,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:59,205 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-09-26 21:34:59,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:59,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:59,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:59,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:59,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:59,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:59,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:34:59,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:59,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:34:59,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:59,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:59,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:59,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:34:59,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:34:59,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:34:59,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:34:59,646 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-09-26 21:34:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:59,787 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-26 21:34:59,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:34:59,788 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-26 21:34:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:59,789 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:34:59,789 INFO L226 Difference]: Without dead ends: 62 [2018-09-26 21:34:59,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:34:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-26 21:34:59,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-26 21:34:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-26 21:34:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-09-26 21:34:59,794 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-09-26 21:34:59,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:59,795 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-09-26 21:34:59,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:34:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-09-26 21:34:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-26 21:34:59,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:59,795 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-09-26 21:34:59,796 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:59,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:59,796 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-09-26 21:34:59,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:59,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:59,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:59,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:59,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:00,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:00,465 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 21:35:00,481 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:35:00,523 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:35:00,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:00,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:00,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:00,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:35:00,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:35:00,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:35:00,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:35:00,607 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-09-26 21:35:01,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:01,698 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-09-26 21:35:01,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:35:01,699 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-09-26 21:35:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:01,699 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:35:01,700 INFO L226 Difference]: Without dead ends: 92 [2018-09-26 21:35:01,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:35:01,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-26 21:35:01,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-09-26 21:35:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-26 21:35:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-09-26 21:35:01,705 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-09-26 21:35:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:01,705 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-09-26 21:35:01,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:35:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-09-26 21:35:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:35:01,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:01,706 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-26 21:35:01,706 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:01,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:01,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-09-26 21:35:01,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:01,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:01,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:01,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:01,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:02,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:02,059 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 21:35:02,067 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:35:02,113 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:35:02,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:02,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:02,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:02,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:35:02,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:35:02,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:35:02,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:35:02,163 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-09-26 21:35:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:02,475 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-09-26 21:35:02,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:35:02,475 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-26 21:35:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:02,476 INFO L225 Difference]: With dead ends: 96 [2018-09-26 21:35:02,476 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:35:02,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:35:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:35:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:35:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:35:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-26 21:35:02,481 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-09-26 21:35:02,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:02,481 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-26 21:35:02,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:35:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-26 21:35:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:35:02,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:02,482 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-09-26 21:35:02,482 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:02,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:02,482 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-09-26 21:35:02,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:02,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:02,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:02,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:02,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:03,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:03,883 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 21:35:03,891 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:35:03,931 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:35:03,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:03,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:03,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:03,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:35:03,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:35:03,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:35:03,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:35:03,967 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-09-26 21:35:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:04,070 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-09-26 21:35:04,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:35:04,071 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-26 21:35:04,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:04,072 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:35:04,072 INFO L226 Difference]: Without dead ends: 64 [2018-09-26 21:35:04,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:35:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-26 21:35:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-26 21:35:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-26 21:35:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-09-26 21:35:04,077 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-09-26 21:35:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:04,077 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-09-26 21:35:04,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:35:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-09-26 21:35:04,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-26 21:35:04,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:04,077 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-09-26 21:35:04,078 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:04,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:04,078 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-09-26 21:35:04,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:04,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:04,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:04,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:04,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:04,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:04,639 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 21:35:04,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:04,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:04,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:04,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:35:04,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:35:04,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:35:04,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:35:04,762 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-09-26 21:35:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:05,935 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-26 21:35:05,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:35:05,935 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-09-26 21:35:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:05,936 INFO L225 Difference]: With dead ends: 98 [2018-09-26 21:35:05,936 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:35:05,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:35:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:35:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-09-26 21:35:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:35:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-26 21:35:05,943 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-09-26 21:35:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:05,943 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-26 21:35:05,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:35:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-26 21:35:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:35:05,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:05,944 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-26 21:35:05,944 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:05,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:05,944 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-09-26 21:35:05,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:05,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:05,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:05,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:05,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:06,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:06,614 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 21:35:06,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:35:06,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:35:06,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:06,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:06,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:06,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:35:06,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:35:06,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:35:06,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:35:06,720 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-09-26 21:35:07,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:07,036 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-09-26 21:35:07,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:35:07,036 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-26 21:35:07,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:07,037 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:35:07,037 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:35:07,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:35:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:35:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:35:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:35:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-26 21:35:07,042 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-09-26 21:35:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:07,042 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-26 21:35:07,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:35:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-26 21:35:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:35:07,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:07,043 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-09-26 21:35:07,043 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:07,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:07,044 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-09-26 21:35:07,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:07,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:07,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:07,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:07,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:07,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:07,439 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 21:35:07,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:35:07,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:35:07,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:07,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:07,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:07,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:35:07,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:35:07,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:35:07,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:35:07,524 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-09-26 21:35:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:07,673 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-26 21:35:07,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:35:07,673 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-26 21:35:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:07,673 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:35:07,673 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:35:07,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:35:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:35:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-26 21:35:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:35:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-09-26 21:35:07,677 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-09-26 21:35:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:07,677 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-09-26 21:35:07,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:35:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-09-26 21:35:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-26 21:35:07,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:07,678 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-09-26 21:35:07,678 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:07,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:07,678 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-09-26 21:35:07,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:07,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:07,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:07,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:07,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:08,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:08,388 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 21:35:08,396 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:35:08,434 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:35:08,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:08,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:08,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:08,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:35:08,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:35:08,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:35:08,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:35:08,483 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-09-26 21:35:09,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:09,702 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-09-26 21:35:09,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:35:09,703 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-09-26 21:35:09,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:09,704 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:35:09,704 INFO L226 Difference]: Without dead ends: 98 [2018-09-26 21:35:09,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:35:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-26 21:35:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-09-26 21:35:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-26 21:35:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-09-26 21:35:09,709 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-09-26 21:35:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:09,709 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-09-26 21:35:09,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:35:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-09-26 21:35:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:35:09,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:09,710 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-26 21:35:09,710 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:09,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:09,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-09-26 21:35:09,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:09,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:09,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:09,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:09,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:10,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:10,097 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 21:35:10,103 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:35:10,150 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-09-26 21:35:10,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:10,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:10,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:10,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:35:10,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:35:10,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:35:10,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:35:10,204 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-09-26 21:35:10,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:10,667 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-09-26 21:35:10,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:35:10,668 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-26 21:35:10,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:10,669 INFO L225 Difference]: With dead ends: 102 [2018-09-26 21:35:10,669 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:35:10,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:35:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:35:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:35:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:35:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-26 21:35:10,675 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-09-26 21:35:10,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:10,675 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-26 21:35:10,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:35:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-26 21:35:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:35:10,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:10,676 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-09-26 21:35:10,676 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:10,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-09-26 21:35:10,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:10,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:10,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:10,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:10,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:11,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:11,118 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 21:35:11,127 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:35:11,172 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-26 21:35:11,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:11,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:11,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:11,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:35:11,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:35:11,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:35:11,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:35:11,208 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-09-26 21:35:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:11,338 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-09-26 21:35:11,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:35:11,338 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-26 21:35:11,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:11,339 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:35:11,339 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:35:11,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:35:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:35:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-26 21:35:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-26 21:35:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-09-26 21:35:11,344 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-09-26 21:35:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:11,344 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-09-26 21:35:11,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:35:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-09-26 21:35:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-26 21:35:11,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:11,345 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-09-26 21:35:11,345 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:11,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-09-26 21:35:11,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:11,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:11,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:11,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:11,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:11,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:11,978 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 21:35:11,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:12,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:12,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:12,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:35:12,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:35:12,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:35:12,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:35:12,127 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-09-26 21:35:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:13,802 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-26 21:35:13,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:35:13,802 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-09-26 21:35:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:13,803 INFO L225 Difference]: With dead ends: 104 [2018-09-26 21:35:13,804 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:35:13,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:35:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:35:13,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-09-26 21:35:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:35:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-26 21:35:13,810 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-09-26 21:35:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:13,810 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-26 21:35:13,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:35:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-26 21:35:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:35:13,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:13,811 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-26 21:35:13,811 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:13,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-09-26 21:35:13,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:13,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:13,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:13,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:13,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:14,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:14,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:35:14,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:35:14,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:35:14,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:14,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:14,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:14,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:35:14,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:35:14,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:35:14,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:35:14,355 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-09-26 21:35:14,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:14,685 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-09-26 21:35:14,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:35:14,686 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-26 21:35:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:14,687 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:35:14,687 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:35:14,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:35:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:35:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:35:14,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:35:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-26 21:35:14,691 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-09-26 21:35:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:14,691 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-26 21:35:14,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:35:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-26 21:35:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:35:14,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:14,692 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-09-26 21:35:14,692 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:14,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:14,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-09-26 21:35:14,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:14,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:14,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:14,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:14,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:15,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:15,305 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 21:35:15,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:35:15,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-26 21:35:15,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:15,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:15,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:15,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:35:15,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:35:15,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:35:15,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:35:15,414 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-09-26 21:35:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:15,598 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-26 21:35:15,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:35:15,598 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-26 21:35:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:15,599 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:35:15,599 INFO L226 Difference]: Without dead ends: 70 [2018-09-26 21:35:15,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 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 21:35:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-26 21:35:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-26 21:35:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:35:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-09-26 21:35:15,604 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-09-26 21:35:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:15,605 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-09-26 21:35:15,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:35:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-09-26 21:35:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-26 21:35:15,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:15,605 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-09-26 21:35:15,605 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:15,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:15,606 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-09-26 21:35:15,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:15,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:15,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:15,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:15,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:16,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:16,210 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) [2018-09-26 21:35:16,219 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:16,260 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:35:16,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:16,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:16,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:16,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:35:16,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:35:16,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:35:16,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:35:16,312 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-09-26 21:35:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:17,948 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-09-26 21:35:17,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:35:17,948 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-09-26 21:35:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:17,949 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:35:17,949 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 21:35:17,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:35:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 21:35:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-09-26 21:35:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-26 21:35:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-09-26 21:35:17,953 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-09-26 21:35:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:17,953 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-09-26 21:35:17,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:35:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-09-26 21:35:17,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:35:17,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:17,954 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-26 21:35:17,954 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:17,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:17,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-09-26 21:35:17,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:17,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:17,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:17,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:17,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:18,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:18,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:35:18,545 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:35:18,601 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:35:18,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:18,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:18,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:18,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:35:18,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:35:18,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:35:18,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:35:18,637 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-09-26 21:35:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:18,956 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-09-26 21:35:18,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:35:18,956 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-26 21:35:18,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:18,957 INFO L225 Difference]: With dead ends: 108 [2018-09-26 21:35:18,957 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:35:18,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:35:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:35:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:35:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:35:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-26 21:35:18,964 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-09-26 21:35:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:18,964 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-26 21:35:18,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:35:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-26 21:35:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:35:18,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:18,965 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-09-26 21:35:18,965 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:18,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:18,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-09-26 21:35:18,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:18,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:18,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:18,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:18,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:19,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:19,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:35:19,477 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:35:19,525 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-09-26 21:35:19,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:19,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:19,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:19,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:35:19,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:35:19,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:35:19,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:35:19,561 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-09-26 21:35:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:19,684 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-09-26 21:35:19,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:35:19,685 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-26 21:35:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:19,686 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:35:19,686 INFO L226 Difference]: Without dead ends: 72 [2018-09-26 21:35:19,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:35:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-26 21:35:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-26 21:35:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-26 21:35:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-09-26 21:35:19,691 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-09-26 21:35:19,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:19,692 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-09-26 21:35:19,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:35:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-09-26 21:35:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-26 21:35:19,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:19,692 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-09-26 21:35:19,692 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:19,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:19,693 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-09-26 21:35:19,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:19,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:19,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:19,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:19,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:20,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:20,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:35:20,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:20,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:20,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:20,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:35:20,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:35:20,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:35:20,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:35:20,484 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-09-26 21:35:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:21,947 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-26 21:35:21,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:35:21,948 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-09-26 21:35:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:21,949 INFO L225 Difference]: With dead ends: 110 [2018-09-26 21:35:21,949 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:35:21,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:35:21,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:35:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-09-26 21:35:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-26 21:35:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-09-26 21:35:21,955 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-09-26 21:35:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:21,955 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-09-26 21:35:21,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:35:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-09-26 21:35:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:35:21,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:21,955 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-26 21:35:21,956 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:21,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:21,956 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-09-26 21:35:21,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:21,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:21,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:21,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:21,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:22,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:22,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:35:22,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:35:22,539 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:35:22,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:22,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:22,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:22,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:35:22,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:35:22,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:35:22,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:35:22,589 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-09-26 21:35:24,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:24,017 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-09-26 21:35:24,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:35:24,018 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-26 21:35:24,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:24,018 INFO L225 Difference]: With dead ends: 111 [2018-09-26 21:35:24,018 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:35:24,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:35:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:35:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:35:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:35:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-26 21:35:24,024 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-09-26 21:35:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:24,024 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-26 21:35:24,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:35:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-26 21:35:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:35:24,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:24,025 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-09-26 21:35:24,025 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:24,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:24,025 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-09-26 21:35:24,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:24,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:24,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:24,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:24,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:24,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:24,556 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 21:35:24,563 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:35:24,612 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:35:24,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:24,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:24,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:24,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:35:24,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:35:24,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:35:24,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:35:24,647 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-09-26 21:35:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:24,768 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-26 21:35:24,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:35:24,769 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-26 21:35:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:24,770 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:35:24,770 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:35:24,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:35:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:35:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-26 21:35:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-26 21:35:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-09-26 21:35:24,775 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-09-26 21:35:24,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:24,775 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-09-26 21:35:24,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:35:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-09-26 21:35:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:35:24,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:24,776 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-09-26 21:35:24,776 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:24,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:24,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-09-26 21:35:24,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:24,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:24,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:24,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:24,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:25,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:25,573 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 21:35:25,580 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:35:25,624 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:35:25,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:25,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:25,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:25,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:35:25,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:35:25,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:35:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:35:25,669 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-09-26 21:35:27,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:27,218 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-09-26 21:35:27,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:35:27,218 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-09-26 21:35:27,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:27,219 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:35:27,219 INFO L226 Difference]: Without dead ends: 110 [2018-09-26 21:35:27,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:35:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-26 21:35:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-09-26 21:35:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:35:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-26 21:35:27,224 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-09-26 21:35:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:27,225 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-26 21:35:27,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:35:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-26 21:35:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:35:27,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:27,225 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-26 21:35:27,225 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:27,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:27,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-09-26 21:35:27,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:27,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:27,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:27,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:27,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:27,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:27,797 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 21:35:27,804 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:35:27,857 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:35:27,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:27,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:27,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:27,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:35:27,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:35:27,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:35:27,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:35:27,909 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-09-26 21:35:28,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:28,424 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-09-26 21:35:28,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:35:28,425 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-26 21:35:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:28,426 INFO L225 Difference]: With dead ends: 114 [2018-09-26 21:35:28,426 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:35:28,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:35:28,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:35:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:35:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:35:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-26 21:35:28,432 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-09-26 21:35:28,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:28,432 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-26 21:35:28,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:35:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-26 21:35:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:35:28,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:28,433 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-09-26 21:35:28,433 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:28,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:28,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-09-26 21:35:28,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:28,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:28,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:28,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:28,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:28,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:28,947 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 21:35:28,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:35:29,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:35:29,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:29,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:29,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:29,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:35:29,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:35:29,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:35:29,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:35:29,061 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-09-26 21:35:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:29,193 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-09-26 21:35:29,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:35:29,194 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-26 21:35:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:29,194 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:35:29,195 INFO L226 Difference]: Without dead ends: 76 [2018-09-26 21:35:29,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:35:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-26 21:35:29,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-26 21:35:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:35:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-09-26 21:35:29,201 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-09-26 21:35:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:29,201 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-09-26 21:35:29,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:35:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-09-26 21:35:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-26 21:35:29,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:29,202 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-09-26 21:35:29,202 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:29,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:29,203 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-09-26 21:35:29,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:29,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:29,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:29,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:29,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:30,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:30,266 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 21:35:30,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:30,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:30,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:30,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:35:30,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:35:30,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:35:30,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:35:30,367 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-09-26 21:35:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:31,978 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-26 21:35:31,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:35:31,978 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-09-26 21:35:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:31,979 INFO L225 Difference]: With dead ends: 116 [2018-09-26 21:35:31,980 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:35:31,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:35:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:35:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-09-26 21:35:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-26 21:35:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-09-26 21:35:31,986 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-09-26 21:35:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:31,986 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-09-26 21:35:31,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:35:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-09-26 21:35:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:35:31,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:31,987 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-26 21:35:31,987 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:31,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:31,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-09-26 21:35:31,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:31,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:31,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:31,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:31,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:32,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:32,534 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 21:35:32,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:35:32,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:35:32,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:32,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:32,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:32,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:35:32,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:35:32,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:35:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:35:32,650 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-09-26 21:35:33,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:33,006 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-09-26 21:35:33,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:35:33,007 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-26 21:35:33,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:33,008 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:35:33,008 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:35:33,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:35:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:35:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:35:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:35:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-26 21:35:33,014 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-09-26 21:35:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:33,014 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-26 21:35:33,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:35:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-26 21:35:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:35:33,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:33,015 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-09-26 21:35:33,015 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:33,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:33,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-09-26 21:35:33,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:33,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:33,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:33,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:33,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:33,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:33,703 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 21:35:33,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:35:33,764 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-09-26 21:35:33,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:33,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:33,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:33,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:35:33,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:35:33,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:35:33,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:35:33,810 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-09-26 21:35:33,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:33,922 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-26 21:35:33,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:35:33,923 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-26 21:35:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:33,923 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:35:33,923 INFO L226 Difference]: Without dead ends: 78 [2018-09-26 21:35:33,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 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 21:35:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-26 21:35:33,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-26 21:35:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-26 21:35:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-09-26 21:35:33,928 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-09-26 21:35:33,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:33,929 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-09-26 21:35:33,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:35:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-09-26 21:35:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-26 21:35:33,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:33,929 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-09-26 21:35:33,929 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:33,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:33,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-09-26 21:35:33,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:33,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:33,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:33,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:33,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:35,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:35,066 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 21:35:35,074 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:35:35,118 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:35:35,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:35,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:35,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:35,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:35:35,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:35:35,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:35:35,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:35:35,157 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-09-26 21:35:36,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:36,804 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-09-26 21:35:36,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:35:36,805 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-09-26 21:35:36,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:36,805 INFO L225 Difference]: With dead ends: 119 [2018-09-26 21:35:36,805 INFO L226 Difference]: Without dead ends: 116 [2018-09-26 21:35:36,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:35:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-26 21:35:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-09-26 21:35:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:35:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-26 21:35:36,810 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-09-26 21:35:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:36,810 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-26 21:35:36,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:35:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-26 21:35:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:35:36,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:36,811 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-26 21:35:36,811 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:36,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:36,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-09-26 21:35:36,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:36,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:36,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:36,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:36,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:37,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:37,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:37,634 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:35:37,690 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-09-26 21:35:37,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:37,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:37,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:37,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:35:37,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:35:37,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:35:37,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:35:37,736 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-09-26 21:35:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:38,164 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-09-26 21:35:38,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:35:38,165 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-26 21:35:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:38,165 INFO L225 Difference]: With dead ends: 120 [2018-09-26 21:35:38,165 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:35:38,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:35:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:35:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:35:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:35:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-26 21:35:38,171 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-09-26 21:35:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:38,171 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-26 21:35:38,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:35:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-26 21:35:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:35:38,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:38,172 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-09-26 21:35:38,172 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:38,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:38,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-09-26 21:35:38,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:38,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:38,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:38,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:38,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:38,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:38,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:38,842 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:35:38,895 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-26 21:35:38,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:38,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:38,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:38,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:35:38,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:35:38,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:35:38,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:35:38,949 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-09-26 21:35:39,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:39,131 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-09-26 21:35:39,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:35:39,131 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-26 21:35:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:39,132 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:35:39,132 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:35:39,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:35:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:35:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-26 21:35:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:35:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-09-26 21:35:39,139 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-09-26 21:35:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:39,139 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-09-26 21:35:39,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:35:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-09-26 21:35:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-26 21:35:39,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:39,140 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-09-26 21:35:39,140 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:39,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:39,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-09-26 21:35:39,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:39,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:39,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:39,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:39,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:39,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:39,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:39,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:39,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:40,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:40,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:35:40,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:35:40,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:35:40,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:35:40,037 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-09-26 21:35:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:41,788 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-26 21:35:41,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:35:41,789 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-09-26 21:35:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:41,789 INFO L225 Difference]: With dead ends: 122 [2018-09-26 21:35:41,790 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:35:41,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:35:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:35:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-09-26 21:35:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-26 21:35:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-09-26 21:35:41,797 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-09-26 21:35:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:41,797 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-09-26 21:35:41,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:35:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-09-26 21:35:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:35:41,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:41,798 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-26 21:35:41,798 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:41,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:41,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-09-26 21:35:41,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:41,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:41,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:41,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:41,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:42,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:42,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:42,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:35:42,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:35:42,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:42,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:42,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:42,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:35:42,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:35:42,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:35:42,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:35:42,620 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-09-26 21:35:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:43,014 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-09-26 21:35:43,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:35:43,014 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-26 21:35:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:43,015 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:35:43,015 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:35:43,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:35:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:35:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:35:43,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:35:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-26 21:35:43,022 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-09-26 21:35:43,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:43,022 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-26 21:35:43,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:35:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-26 21:35:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:35:43,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:43,023 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-09-26 21:35:43,023 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:43,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:43,023 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-09-26 21:35:43,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:43,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:43,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:43,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:43,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:43,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:43,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:43,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:35:43,922 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-09-26 21:35:43,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:43,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:43,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:43,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:35:43,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:35:43,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:35:43,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:35:43,960 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-09-26 21:35:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:44,068 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-26 21:35:44,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:35:44,069 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-26 21:35:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:44,069 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:35:44,070 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:35:44,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:35:44,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:35:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-26 21:35:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-26 21:35:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-09-26 21:35:44,075 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-09-26 21:35:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:44,075 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-09-26 21:35:44,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:35:44,076 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-09-26 21:35:44,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-26 21:35:44,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:44,076 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-09-26 21:35:44,076 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:44,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:44,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-09-26 21:35:44,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:44,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:44,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:44,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:44,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:44,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:44,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:44,918 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:35:44,966 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:35:44,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:44,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:45,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:45,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:35:45,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:35:45,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:35:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:35:45,013 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-09-26 21:35:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:46,842 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-09-26 21:35:46,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:35:46,842 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-09-26 21:35:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:46,843 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:35:46,843 INFO L226 Difference]: Without dead ends: 122 [2018-09-26 21:35:46,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:35:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-26 21:35:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-09-26 21:35:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-26 21:35:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-09-26 21:35:46,848 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-09-26 21:35:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:46,849 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-09-26 21:35:46,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:35:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-09-26 21:35:46,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:35:46,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:46,849 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-09-26 21:35:46,849 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:46,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:46,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-09-26 21:35:46,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:46,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:46,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:46,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:46,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:47,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:47,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:47,538 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:35:47,600 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-09-26 21:35:47,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:47,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:47,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:47,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:35:47,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:35:47,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:35:47,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:35:47,637 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-09-26 21:35:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:48,108 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-09-26 21:35:48,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:35:48,109 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-26 21:35:48,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:48,109 INFO L225 Difference]: With dead ends: 126 [2018-09-26 21:35:48,109 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:35:48,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:35:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:35:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:35:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:35:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-26 21:35:48,115 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-09-26 21:35:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:48,115 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-26 21:35:48,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:35:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-26 21:35:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:35:48,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:48,116 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-09-26 21:35:48,116 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:48,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-09-26 21:35:48,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:48,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:48,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:48,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:48,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:48,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:48,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:48,827 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:35:48,883 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-26 21:35:48,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:48,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:48,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:48,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:35:48,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:35:48,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:35:48,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:35:48,920 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-09-26 21:35:49,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:49,042 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-09-26 21:35:49,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:35:49,042 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-26 21:35:49,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:49,043 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:35:49,043 INFO L226 Difference]: Without dead ends: 84 [2018-09-26 21:35:49,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:35:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-26 21:35:49,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-26 21:35:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-26 21:35:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-09-26 21:35:49,049 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-09-26 21:35:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:49,049 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-09-26 21:35:49,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:35:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-09-26 21:35:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:35:49,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:49,050 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-09-26 21:35:49,050 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:49,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:49,050 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-09-26 21:35:49,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:49,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:49,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:49,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:49,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:49,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:49,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:49,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:49,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:50,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:50,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:35:50,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:35:50,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:35:50,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:35:50,009 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-09-26 21:35:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:51,930 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-26 21:35:51,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:35:51,930 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-09-26 21:35:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:51,931 INFO L225 Difference]: With dead ends: 128 [2018-09-26 21:35:51,931 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:35:51,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:35:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:35:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-09-26 21:35:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:35:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-26 21:35:51,937 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-09-26 21:35:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:51,937 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-26 21:35:51,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:35:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-26 21:35:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:35:51,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:51,938 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-09-26 21:35:51,938 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:51,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:51,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-09-26 21:35:51,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:51,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:51,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:51,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:51,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:52,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:52,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:52,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:35:52,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:35:52,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:52,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:52,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:52,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:35:52,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:35:52,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:35:52,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:35:52,671 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-09-26 21:35:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:52,989 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-09-26 21:35:52,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:35:52,990 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-26 21:35:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:52,990 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:35:52,990 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:35:52,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:35:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:35:52,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:35:52,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:35:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-26 21:35:52,998 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-09-26 21:35:52,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:52,998 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-26 21:35:52,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:35:52,998 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-26 21:35:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:35:52,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:52,999 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-09-26 21:35:52,999 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:52,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-09-26 21:35:52,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:52,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:53,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:53,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:53,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:53,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:53,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:53,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:35:53,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:35:53,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:53,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:53,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:53,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:35:53,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:35:53,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:35:53,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:35:53,952 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-09-26 21:35:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:54,083 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-26 21:35:54,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:35:54,083 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-26 21:35:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:54,084 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:35:54,084 INFO L226 Difference]: Without dead ends: 86 [2018-09-26 21:35:54,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:35:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-26 21:35:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-26 21:35:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:35:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-09-26 21:35:54,091 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-09-26 21:35:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:54,091 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-09-26 21:35:54,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:35:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-09-26 21:35:54,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-26 21:35:54,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:54,092 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-09-26 21:35:54,092 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:54,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:54,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-09-26 21:35:54,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:54,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:54,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:54,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:54,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:55,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:55,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:55,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:35:55,072 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:35:55,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:55,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:55,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:55,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:35:55,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:35:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:35:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:35:55,142 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-09-26 21:35:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:57,156 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-09-26 21:35:57,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:35:57,156 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-09-26 21:35:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:57,157 INFO L225 Difference]: With dead ends: 131 [2018-09-26 21:35:57,157 INFO L226 Difference]: Without dead ends: 128 [2018-09-26 21:35:57,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:35:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-26 21:35:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-09-26 21:35:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-26 21:35:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-09-26 21:35:57,164 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-09-26 21:35:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:57,164 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-09-26 21:35:57,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:35:57,164 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-09-26 21:35:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:35:57,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:57,165 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-09-26 21:35:57,165 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:57,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:57,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-09-26 21:35:57,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:57,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:57,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:57,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:57,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:57,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:57,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:57,906 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:35:57,971 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:35:57,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:57,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:58,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:58,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:35:58,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:35:58,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:35:58,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:35:58,014 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-09-26 21:35:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:58,425 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-09-26 21:35:58,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:35:58,425 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-26 21:35:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:58,426 INFO L225 Difference]: With dead ends: 132 [2018-09-26 21:35:58,426 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:35:58,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:35:58,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:35:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-26 21:35:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:35:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-26 21:35:58,431 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-09-26 21:35:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:58,431 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-26 21:35:58,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:35:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-26 21:35:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:35:58,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:58,432 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-09-26 21:35:58,432 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:58,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:58,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-09-26 21:35:58,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:58,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:58,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:58,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:58,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:59,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:59,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:59,186 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:35:59,245 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:35:59,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:59,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:59,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:59,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:35:59,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:35:59,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:35:59,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:35:59,284 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-09-26 21:35:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:59,405 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-09-26 21:35:59,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:35:59,405 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-26 21:35:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:59,406 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:35:59,406 INFO L226 Difference]: Without dead ends: 88 [2018-09-26 21:35:59,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 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 21:35:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-26 21:35:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-26 21:35:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-26 21:35:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-09-26 21:35:59,412 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-09-26 21:35:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:59,413 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-09-26 21:35:59,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:35:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-09-26 21:35:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-26 21:35:59,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:59,413 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-09-26 21:35:59,413 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:59,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:59,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-09-26 21:35:59,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:59,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:59,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:59,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:59,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:00,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:00,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:00,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:00,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:00,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:00,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:36:00,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:36:00,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:36:00,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:36:00,483 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-09-26 21:36:02,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:02,637 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-26 21:36:02,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:36:02,637 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-09-26 21:36:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:02,638 INFO L225 Difference]: With dead ends: 134 [2018-09-26 21:36:02,638 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:36:02,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:36:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:36:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-09-26 21:36:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-26 21:36:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-09-26 21:36:02,643 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-09-26 21:36:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:02,644 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-09-26 21:36:02,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:36:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-09-26 21:36:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:36:02,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:02,644 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-09-26 21:36:02,644 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:02,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-09-26 21:36:02,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:02,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:02,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:02,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:02,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:03,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:03,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:03,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:36:03,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:36:03,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:03,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:03,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:03,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:36:03,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:36:03,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:36:03,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:36:03,460 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-09-26 21:36:04,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:04,082 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-09-26 21:36:04,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:36:04,082 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-26 21:36:04,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:04,083 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:36:04,083 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:36:04,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:36:04,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:36:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:36:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:36:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-26 21:36:04,089 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-09-26 21:36:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:04,089 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-26 21:36:04,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:36:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-26 21:36:04,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:36:04,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:04,090 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-09-26 21:36:04,090 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:04,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:04,090 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-09-26 21:36:04,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:04,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:04,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:04,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:04,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:04,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:04,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:04,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:36:04,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-26 21:36:04,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:04,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:04,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:04,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:36:04,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:36:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:36:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:36:04,967 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-09-26 21:36:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:05,090 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-26 21:36:05,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:36:05,090 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-26 21:36:05,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:05,091 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:36:05,091 INFO L226 Difference]: Without dead ends: 90 [2018-09-26 21:36:05,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:36:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-26 21:36:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-26 21:36:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-26 21:36:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-09-26 21:36:05,098 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-09-26 21:36:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:05,098 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-09-26 21:36:05,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:36:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-09-26 21:36:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-26 21:36:05,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:05,099 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-09-26 21:36:05,099 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:05,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:05,099 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-09-26 21:36:05,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:05,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:05,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:05,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:05,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:06,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:06,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:06,090 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:36:06,144 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:36:06,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:06,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:06,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:06,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:36:06,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:36:06,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:36:06,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:36:06,186 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-09-26 21:36:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:08,426 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-09-26 21:36:08,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:36:08,426 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-09-26 21:36:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:08,427 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:36:08,427 INFO L226 Difference]: Without dead ends: 134 [2018-09-26 21:36:08,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:36:08,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-26 21:36:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-09-26 21:36:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-26 21:36:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-09-26 21:36:08,433 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-09-26 21:36:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:08,433 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-09-26 21:36:08,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:36:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-09-26 21:36:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:36:08,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:08,434 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-09-26 21:36:08,434 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:08,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:08,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-09-26 21:36:08,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:08,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:08,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:08,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:08,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:09,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:09,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:09,213 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:36:09,281 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-09-26 21:36:09,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:09,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:09,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:09,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:36:09,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:36:09,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:36:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:36:09,322 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-09-26 21:36:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:09,904 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-09-26 21:36:09,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:36:09,905 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-26 21:36:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:09,906 INFO L225 Difference]: With dead ends: 138 [2018-09-26 21:36:09,906 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:36:09,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:36:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:36:09,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:36:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:36:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-26 21:36:09,912 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-09-26 21:36:09,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:09,912 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-26 21:36:09,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:36:09,912 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-26 21:36:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:36:09,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:09,912 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-09-26 21:36:09,913 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:09,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:09,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-09-26 21:36:09,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:09,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:09,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:09,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:09,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:10,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:10,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:36:10,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:10,730 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-26 21:36:10,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:10,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:10,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:10,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:36:10,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:36:10,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:36:10,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:36:10,774 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-09-26 21:36:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:10,917 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-09-26 21:36:10,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:36:10,920 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-26 21:36:10,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:10,920 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:36:10,921 INFO L226 Difference]: Without dead ends: 92 [2018-09-26 21:36:10,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:36:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-26 21:36:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-26 21:36:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-26 21:36:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-09-26 21:36:10,926 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-09-26 21:36:10,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:10,926 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-09-26 21:36:10,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:36:10,926 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-09-26 21:36:10,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-26 21:36:10,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:10,926 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-09-26 21:36:10,927 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:10,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:10,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-09-26 21:36:10,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:10,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:10,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:10,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:10,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:12,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:12,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:12,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:12,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:12,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:12,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:36:12,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:36:12,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:36:12,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:36:12,108 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-09-26 21:36:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:14,425 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-26 21:36:14,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:36:14,426 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-09-26 21:36:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:14,427 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:36:14,427 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:36:14,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:36:14,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:36:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-09-26 21:36:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-26 21:36:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-26 21:36:14,433 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-09-26 21:36:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:14,433 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-26 21:36:14,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:36:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-26 21:36:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:36:14,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:14,434 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-09-26 21:36:14,434 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:14,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:14,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-09-26 21:36:14,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:14,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:14,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:14,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:14,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:15,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:15,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:15,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:36:15,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:36:15,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:15,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:15,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:15,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:36:15,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:36:15,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:36:15,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:36:15,275 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-09-26 21:36:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:15,858 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-09-26 21:36:15,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:36:15,859 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-26 21:36:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:15,859 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:36:15,859 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:36:15,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:36:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:36:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:36:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:36:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-26 21:36:15,865 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-09-26 21:36:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:15,866 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-26 21:36:15,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:36:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-26 21:36:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:36:15,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:15,866 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-09-26 21:36:15,867 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:15,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:15,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-09-26 21:36:15,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:15,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:15,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:15,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:15,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:16,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:16,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:16,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:36:16,917 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-26 21:36:16,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:16,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:16,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:16,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:36:16,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:36:16,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:36:16,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:36:16,959 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-09-26 21:36:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:17,095 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-26 21:36:17,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:36:17,095 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-26 21:36:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:17,096 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:36:17,096 INFO L226 Difference]: Without dead ends: 94 [2018-09-26 21:36:17,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:36:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-26 21:36:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-26 21:36:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-26 21:36:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-09-26 21:36:17,103 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-09-26 21:36:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:17,104 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-09-26 21:36:17,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:36:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-09-26 21:36:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-26 21:36:17,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:17,104 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-09-26 21:36:17,105 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:17,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-09-26 21:36:17,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:17,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:17,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:17,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:17,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:18,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:18,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:18,263 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:36:18,317 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:36:18,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:18,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:18,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:18,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:36:18,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:36:18,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:36:18,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:36:18,367 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-09-26 21:36:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:20,784 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-09-26 21:36:20,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:36:20,784 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-09-26 21:36:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:20,785 INFO L225 Difference]: With dead ends: 143 [2018-09-26 21:36:20,785 INFO L226 Difference]: Without dead ends: 140 [2018-09-26 21:36:20,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:36:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-26 21:36:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-09-26 21:36:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-26 21:36:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-09-26 21:36:20,791 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-09-26 21:36:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:20,791 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-09-26 21:36:20,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:36:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-09-26 21:36:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:36:20,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:20,792 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-09-26 21:36:20,792 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:20,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:20,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-09-26 21:36:20,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:20,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:20,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:20,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:20,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:21,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:21,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:21,548 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:36:21,620 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-26 21:36:21,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:21,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:21,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:21,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:36:21,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:36:21,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:36:21,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:36:21,660 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-09-26 21:36:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:22,045 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-09-26 21:36:22,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:36:22,045 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-26 21:36:22,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:22,046 INFO L225 Difference]: With dead ends: 144 [2018-09-26 21:36:22,046 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:36:22,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:36:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:36:22,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:36:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:36:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-26 21:36:22,052 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-09-26 21:36:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:22,052 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-26 21:36:22,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:36:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-26 21:36:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:36:22,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:22,053 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-09-26 21:36:22,053 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:22,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:22,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-09-26 21:36:22,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:22,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:22,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:22,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:22,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:22,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:22,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:22,887 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:36:22,956 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-09-26 21:36:22,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:22,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:23,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:23,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:36:23,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:36:23,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:36:23,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:36:23,006 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-09-26 21:36:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:23,138 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-09-26 21:36:23,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:36:23,138 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-26 21:36:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:23,139 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:36:23,139 INFO L226 Difference]: Without dead ends: 96 [2018-09-26 21:36:23,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:36:23,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-26 21:36:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-26 21:36:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-26 21:36:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-09-26 21:36:23,145 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-09-26 21:36:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:23,145 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-09-26 21:36:23,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:36:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-09-26 21:36:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-26 21:36:23,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:23,145 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-09-26 21:36:23,146 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:23,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:23,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-09-26 21:36:23,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:23,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:23,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:23,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:23,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:24,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:24,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:24,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:24,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:24,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:24,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:36:24,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:36:24,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:36:24,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:36:24,355 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-09-26 21:36:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:26,886 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-26 21:36:26,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:36:26,886 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-09-26 21:36:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:26,887 INFO L225 Difference]: With dead ends: 146 [2018-09-26 21:36:26,887 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:36:26,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:36:26,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:36:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-09-26 21:36:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-26 21:36:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-09-26 21:36:26,893 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-09-26 21:36:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:26,894 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-09-26 21:36:26,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:36:26,894 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-09-26 21:36:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:36:26,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:26,894 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-09-26 21:36:26,894 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:26,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:26,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-09-26 21:36:26,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:26,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:26,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:26,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:26,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:27,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:27,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:27,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:36:27,742 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:36:27,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:27,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:27,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:27,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:36:27,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:36:27,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:36:27,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:36:27,790 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-09-26 21:36:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:28,439 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-09-26 21:36:28,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:36:28,440 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-26 21:36:28,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:28,440 INFO L225 Difference]: With dead ends: 147 [2018-09-26 21:36:28,441 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:36:28,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:36:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:36:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:36:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:36:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-26 21:36:28,447 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-09-26 21:36:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:28,447 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-26 21:36:28,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:36:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-26 21:36:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:36:28,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:28,448 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-09-26 21:36:28,448 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:28,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-09-26 21:36:28,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:28,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:28,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:28,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:28,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:29,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:29,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:29,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:36:29,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:36:29,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:29,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:29,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:29,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:36:29,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:36:29,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:36:29,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:36:29,427 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-09-26 21:36:29,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:29,599 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-26 21:36:29,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:36:29,600 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-26 21:36:29,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:29,600 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:36:29,601 INFO L226 Difference]: Without dead ends: 98 [2018-09-26 21:36:29,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:36:29,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-26 21:36:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-26 21:36:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-26 21:36:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-09-26 21:36:29,607 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-09-26 21:36:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:29,607 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-09-26 21:36:29,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:36:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-09-26 21:36:29,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-26 21:36:29,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:29,608 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-09-26 21:36:29,608 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:29,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:29,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-09-26 21:36:29,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:29,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:29,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:29,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:29,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:30,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:30,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:30,753 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:36:30,811 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:36:30,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:30,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:30,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:30,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:36:30,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:36:30,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:36:30,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:36:30,858 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-09-26 21:36:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:33,479 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-09-26 21:36:33,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:36:33,480 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-09-26 21:36:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:33,480 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:36:33,480 INFO L226 Difference]: Without dead ends: 146 [2018-09-26 21:36:33,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:36:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-26 21:36:33,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-09-26 21:36:33,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:36:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-26 21:36:33,487 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-09-26 21:36:33,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:33,487 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-26 21:36:33,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:36:33,488 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-26 21:36:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:36:33,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:33,488 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-09-26 21:36:33,488 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:33,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:33,488 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-09-26 21:36:33,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:33,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:33,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:33,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:33,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:34,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:34,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:34,316 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:36:34,392 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:36:34,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:34,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:34,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:34,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:36:34,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:36:34,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:36:34,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:36:34,448 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-09-26 21:36:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:35,137 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-09-26 21:36:35,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:36:35,137 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-26 21:36:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:35,138 INFO L225 Difference]: With dead ends: 150 [2018-09-26 21:36:35,138 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:36:35,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:36:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:36:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:36:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:36:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-26 21:36:35,144 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-09-26 21:36:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:35,144 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-26 21:36:35,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:36:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-26 21:36:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:36:35,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:35,144 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-09-26 21:36:35,144 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:35,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-09-26 21:36:35,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:35,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:35,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:35,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:35,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:36,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:36,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:36,024 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:36:36,095 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:36:36,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:36,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:36,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:36,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:36:36,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:36:36,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:36:36,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:36:36,136 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-09-26 21:36:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:36,307 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-09-26 21:36:36,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:36:36,307 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-26 21:36:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:36,308 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:36:36,308 INFO L226 Difference]: Without dead ends: 100 [2018-09-26 21:36:36,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:36:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-26 21:36:36,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-26 21:36:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:36:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-09-26 21:36:36,315 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-09-26 21:36:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:36,315 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-09-26 21:36:36,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:36:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-09-26 21:36:36,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-26 21:36:36,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:36,315 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-09-26 21:36:36,316 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:36,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:36,316 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-09-26 21:36:36,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:36,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:36,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:36,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:36,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:37,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:37,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:37,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:37,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:37,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:37,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:36:37,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:36:37,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:36:37,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:36:37,598 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-09-26 21:36:40,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:40,326 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-26 21:36:40,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:36:40,327 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-09-26 21:36:40,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:40,328 INFO L225 Difference]: With dead ends: 152 [2018-09-26 21:36:40,328 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:36:40,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:36:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:36:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-09-26 21:36:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-26 21:36:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-09-26 21:36:40,334 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-09-26 21:36:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:40,334 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-09-26 21:36:40,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:36:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-09-26 21:36:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:36:40,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:40,334 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-09-26 21:36:40,335 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:40,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-09-26 21:36:40,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:40,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:40,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:40,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:40,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:41,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:41,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:41,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:36:41,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:36:41,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:41,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:41,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:41,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:36:41,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:36:41,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:36:41,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:36:41,300 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-09-26 21:36:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:41,997 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-09-26 21:36:41,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:36:41,997 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-26 21:36:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:41,998 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:36:41,998 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:36:41,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:36:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:36:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:36:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:36:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-26 21:36:42,007 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-09-26 21:36:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:42,007 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-26 21:36:42,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:36:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-26 21:36:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:36:42,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:42,007 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-09-26 21:36:42,008 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:42,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-09-26 21:36:42,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:42,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:42,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:42,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:42,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:42,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:42,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:42,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:36:43,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-09-26 21:36:43,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:43,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:43,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:43,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:36:43,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:36:43,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:36:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:36:43,052 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-09-26 21:36:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:43,213 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-26 21:36:43,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:36:43,213 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-26 21:36:43,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:43,214 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:36:43,214 INFO L226 Difference]: Without dead ends: 102 [2018-09-26 21:36:43,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:36:43,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-26 21:36:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-26 21:36:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-26 21:36:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-09-26 21:36:43,221 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-09-26 21:36:43,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:43,221 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-09-26 21:36:43,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:36:43,221 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-09-26 21:36:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-26 21:36:43,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:43,221 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-09-26 21:36:43,221 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:43,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:43,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-09-26 21:36:43,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:43,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:43,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:43,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:43,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:44,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:44,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:44,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:36:44,633 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:36:44,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:44,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:44,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:44,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:36:44,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:36:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:36:44,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:36:44,681 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-09-26 21:36:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:47,535 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-09-26 21:36:47,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:36:47,535 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-09-26 21:36:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:47,536 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:36:47,536 INFO L226 Difference]: Without dead ends: 152 [2018-09-26 21:36:47,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:36:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-26 21:36:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-09-26 21:36:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-26 21:36:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-09-26 21:36:47,543 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-09-26 21:36:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:47,543 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-09-26 21:36:47,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:36:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-09-26 21:36:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:36:47,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:47,543 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-09-26 21:36:47,544 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:47,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:47,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-09-26 21:36:47,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:47,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:47,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:47,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:47,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:48,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:48,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:48,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:36:48,572 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-09-26 21:36:48,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:48,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:48,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:48,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:36:48,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:36:48,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:36:48,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:36:48,614 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-09-26 21:36:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:49,345 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-09-26 21:36:49,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:36:49,346 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-26 21:36:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:49,346 INFO L225 Difference]: With dead ends: 156 [2018-09-26 21:36:49,346 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:36:49,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:36:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:36:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 21:36:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:36:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-26 21:36:49,353 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-09-26 21:36:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:49,354 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-26 21:36:49,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:36:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-26 21:36:49,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:36:49,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:49,354 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-09-26 21:36:49,354 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:49,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:49,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-09-26 21:36:49,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:49,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:49,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:49,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:49,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:50,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:50,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:50,329 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:36:50,403 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-26 21:36:50,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:50,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:50,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:50,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:36:50,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:36:50,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:36:50,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:36:50,446 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-09-26 21:36:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:50,592 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-09-26 21:36:50,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:36:50,592 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-26 21:36:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:50,593 INFO L225 Difference]: With dead ends: 107 [2018-09-26 21:36:50,593 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 21:36:50,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:36:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 21:36:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-26 21:36:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-26 21:36:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-09-26 21:36:50,600 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-09-26 21:36:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:50,600 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-09-26 21:36:50,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:36:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-09-26 21:36:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-26 21:36:50,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:50,601 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-09-26 21:36:50,601 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:50,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-09-26 21:36:50,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:50,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:50,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:50,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:50,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:51,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:51,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:51,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:51,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:51,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:51,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:36:51,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:36:51,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:36:51,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:36:51,979 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-09-26 21:36:54,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:54,963 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-26 21:36:54,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:36:54,964 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-09-26 21:36:54,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:54,964 INFO L225 Difference]: With dead ends: 158 [2018-09-26 21:36:54,965 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:36:54,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:36:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:36:54,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-09-26 21:36:54,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-26 21:36:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-26 21:36:54,972 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-09-26 21:36:54,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:54,972 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-26 21:36:54,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:36:54,972 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-26 21:36:54,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:36:54,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:54,972 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-09-26 21:36:54,972 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:54,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:54,973 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-09-26 21:36:54,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:54,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:54,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:54,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:36:54,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:55,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:55,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:55,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:36:56,000 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:36:56,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:56,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:56,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:56,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:36:56,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:36:56,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:36:56,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:36:56,042 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-09-26 21:36:56,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:56,515 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-09-26 21:36:56,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:36:56,515 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-26 21:36:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:56,516 INFO L225 Difference]: With dead ends: 159 [2018-09-26 21:36:56,516 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:36:56,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:36:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:36:56,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:36:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:36:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-26 21:36:56,523 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-09-26 21:36:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:56,523 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-26 21:36:56,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:36:56,523 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-26 21:36:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:36:56,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:56,523 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-09-26 21:36:56,524 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:56,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-09-26 21:36:56,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:56,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:56,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:56,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:56,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:57,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:57,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:57,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:36:57,597 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-09-26 21:36:57,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:57,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:57,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:57,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:36:57,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:36:57,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:36:57,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:36:57,640 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-09-26 21:36:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:36:57,789 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-26 21:36:57,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:36:57,789 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-26 21:36:57,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:36:57,790 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:36:57,790 INFO L226 Difference]: Without dead ends: 106 [2018-09-26 21:36:57,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:36:57,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-26 21:36:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-26 21:36:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-26 21:36:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-09-26 21:36:57,796 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-09-26 21:36:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:36:57,797 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-09-26 21:36:57,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:36:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-09-26 21:36:57,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-26 21:36:57,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:36:57,797 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-09-26 21:36:57,798 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:36:57,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:36:57,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-09-26 21:36:57,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:36:57,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:36:57,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:57,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:36:57,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:36:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:36:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:59,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:36:59,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:36:59,118 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:36:59,180 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:36:59,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:36:59,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:36:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:36:59,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:36:59,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:36:59,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:36:59,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:36:59,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:36:59,234 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-09-26 21:37:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:02,362 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-09-26 21:37:02,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:37:02,362 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-09-26 21:37:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:02,363 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:37:02,363 INFO L226 Difference]: Without dead ends: 158 [2018-09-26 21:37:02,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:37:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-26 21:37:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-09-26 21:37:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-26 21:37:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-09-26 21:37:02,370 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-09-26 21:37:02,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:02,370 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-09-26 21:37:02,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:37:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-09-26 21:37:02,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:37:02,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:02,371 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-09-26 21:37:02,371 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:02,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:02,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-09-26 21:37:02,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:02,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:02,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:02,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:02,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:03,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:03,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:03,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:37:03,426 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-09-26 21:37:03,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:03,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:03,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:03,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:37:03,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:37:03,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:37:03,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:37:03,469 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-09-26 21:37:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:04,313 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-09-26 21:37:04,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:37:04,313 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-26 21:37:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:04,314 INFO L225 Difference]: With dead ends: 162 [2018-09-26 21:37:04,314 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:37:04,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:37:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:37:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 21:37:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:37:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-26 21:37:04,323 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-09-26 21:37:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:04,323 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-26 21:37:04,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:37:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-26 21:37:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:37:04,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:04,324 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-09-26 21:37:04,324 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:04,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-09-26 21:37:04,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:04,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:04,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:04,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:04,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:05,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:05,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:05,362 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:37:05,442 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-09-26 21:37:05,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:05,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:05,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:05,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:37:05,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:37:05,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:37:05,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:37:05,485 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-09-26 21:37:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:05,694 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-09-26 21:37:05,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:37:05,695 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-26 21:37:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:05,695 INFO L225 Difference]: With dead ends: 111 [2018-09-26 21:37:05,695 INFO L226 Difference]: Without dead ends: 108 [2018-09-26 21:37:05,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:37:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-26 21:37:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-26 21:37:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-26 21:37:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-09-26 21:37:05,703 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-09-26 21:37:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:05,703 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-09-26 21:37:05,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:37:05,703 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-09-26 21:37:05,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-26 21:37:05,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:05,704 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-09-26 21:37:05,704 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:05,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:05,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-09-26 21:37:05,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:05,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:05,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:05,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:05,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:07,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:07,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:07,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:37:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:07,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:07,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:07,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:37:07,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:37:07,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:37:07,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:37:07,184 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-09-26 21:37:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:10,462 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-26 21:37:10,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:37:10,462 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-09-26 21:37:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:10,463 INFO L225 Difference]: With dead ends: 164 [2018-09-26 21:37:10,463 INFO L226 Difference]: Without dead ends: 161 [2018-09-26 21:37:10,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:37:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-26 21:37:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-09-26 21:37:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-26 21:37:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-26 21:37:10,471 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-09-26 21:37:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:10,471 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-26 21:37:10,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:37:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-26 21:37:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:37:10,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:10,471 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-09-26 21:37:10,472 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:10,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:10,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-09-26 21:37:10,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:10,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:10,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:10,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:37:10,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:11,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:11,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:11,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:37:11,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:37:11,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:11,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:11,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:11,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:37:11,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:37:11,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:37:11,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:37:11,597 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-09-26 21:37:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:12,225 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-09-26 21:37:12,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:37:12,225 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-26 21:37:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:12,226 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:37:12,226 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:37:12,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:37:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:37:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:37:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:37:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-26 21:37:12,234 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-09-26 21:37:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:12,235 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-26 21:37:12,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:37:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-26 21:37:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:37:12,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:12,235 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-09-26 21:37:12,236 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:12,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:12,236 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-09-26 21:37:12,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:12,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:12,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:12,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:12,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:13,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:13,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:13,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:37:13,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:37:13,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:13,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:13,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:13,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:37:13,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:37:13,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:37:13,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:37:13,445 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-09-26 21:37:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:13,627 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-26 21:37:13,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:37:13,628 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-26 21:37:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:13,628 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:37:13,628 INFO L226 Difference]: Without dead ends: 110 [2018-09-26 21:37:13,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:37:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-26 21:37:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-26 21:37:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-26 21:37:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-09-26 21:37:13,635 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-09-26 21:37:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:13,635 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-09-26 21:37:13,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:37:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-09-26 21:37:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-26 21:37:13,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:13,636 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-09-26 21:37:13,636 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:13,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:13,636 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-09-26 21:37:13,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:13,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:13,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:13,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:13,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:15,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:15,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:15,065 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:37:15,131 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:37:15,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:15,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:15,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:15,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:37:15,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:37:15,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:37:15,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:37:15,180 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-09-26 21:37:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:18,533 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-09-26 21:37:18,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:37:18,533 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-09-26 21:37:18,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:18,534 INFO L225 Difference]: With dead ends: 167 [2018-09-26 21:37:18,534 INFO L226 Difference]: Without dead ends: 164 [2018-09-26 21:37:18,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:37:18,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-26 21:37:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-09-26 21:37:18,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-26 21:37:18,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-26 21:37:18,542 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-09-26 21:37:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:18,542 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-26 21:37:18,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:37:18,542 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-26 21:37:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:37:18,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:18,542 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-09-26 21:37:18,542 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:18,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:18,543 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-09-26 21:37:18,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:18,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:18,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:18,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:18,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:19,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:19,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:19,574 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:37:19,661 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:37:19,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:19,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:19,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:19,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:37:19,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:37:19,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:37:19,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:37:19,719 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-09-26 21:37:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:20,584 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-09-26 21:37:20,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:37:20,585 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-26 21:37:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:20,585 INFO L225 Difference]: With dead ends: 168 [2018-09-26 21:37:20,586 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:37:20,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:37:20,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:37:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 21:37:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:37:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-26 21:37:20,597 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-09-26 21:37:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:20,597 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-26 21:37:20,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:37:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-26 21:37:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:37:20,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:20,598 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-09-26 21:37:20,598 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:20,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:20,599 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-09-26 21:37:20,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:20,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:20,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:20,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:20,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:22,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:22,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:22,344 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:37:22,428 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-26 21:37:22,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:22,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:22,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:22,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:37:22,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:37:22,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:37:22,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:37:22,473 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-09-26 21:37:22,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:22,657 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-09-26 21:37:22,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:37:22,658 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-26 21:37:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:22,658 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:37:22,658 INFO L226 Difference]: Without dead ends: 112 [2018-09-26 21:37:22,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:37:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-26 21:37:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-26 21:37:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-26 21:37:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-09-26 21:37:22,666 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-09-26 21:37:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:22,667 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-09-26 21:37:22,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:37:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-09-26 21:37:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-26 21:37:22,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:22,667 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-09-26 21:37:22,667 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:22,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-09-26 21:37:22,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:22,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:22,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:22,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:22,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:24,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:24,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:24,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:37:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:24,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:24,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:24,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:37:24,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:37:24,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:37:24,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:37:24,234 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-09-26 21:37:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:27,706 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-26 21:37:27,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:37:27,707 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-09-26 21:37:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:27,707 INFO L225 Difference]: With dead ends: 170 [2018-09-26 21:37:27,708 INFO L226 Difference]: Without dead ends: 167 [2018-09-26 21:37:27,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:37:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-26 21:37:27,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-09-26 21:37:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-26 21:37:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-09-26 21:37:27,716 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-09-26 21:37:27,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:27,716 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-09-26 21:37:27,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:37:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-09-26 21:37:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:37:27,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:27,717 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-09-26 21:37:27,717 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:27,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-09-26 21:37:27,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:27,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:27,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:27,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:37:27,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:28,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:28,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:28,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:37:28,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:37:28,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:28,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:28,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:28,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:37:28,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:37:28,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:37:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:37:28,902 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-09-26 21:37:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:29,420 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-09-26 21:37:29,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:37:29,420 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-26 21:37:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:29,421 INFO L225 Difference]: With dead ends: 171 [2018-09-26 21:37:29,421 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:37:29,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:37:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:37:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:37:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:37:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-26 21:37:29,429 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-09-26 21:37:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:29,429 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-26 21:37:29,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:37:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-26 21:37:29,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:37:29,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:29,430 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-09-26 21:37:29,430 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:29,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:29,430 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-09-26 21:37:29,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:29,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:29,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:29,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:29,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:30,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:30,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:30,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:37:30,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:37:30,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:30,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:30,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:30,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:37:30,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:37:30,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:37:30,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:37:30,704 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-09-26 21:37:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:30,872 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-26 21:37:30,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:37:30,872 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-26 21:37:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:30,872 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:37:30,872 INFO L226 Difference]: Without dead ends: 114 [2018-09-26 21:37:30,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:37:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-26 21:37:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-26 21:37:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-26 21:37:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-09-26 21:37:30,884 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-09-26 21:37:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:30,884 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-09-26 21:37:30,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:37:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-09-26 21:37:30,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-26 21:37:30,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:30,885 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-09-26 21:37:30,885 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:30,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:30,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-09-26 21:37:30,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:30,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:30,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:30,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:30,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:32,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:32,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:32,390 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:37:32,458 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:37:32,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:32,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:32,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:32,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:37:32,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:37:32,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:37:32,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:37:32,508 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-09-26 21:37:36,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:36,102 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-09-26 21:37:36,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:37:36,102 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-09-26 21:37:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:36,103 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:37:36,103 INFO L226 Difference]: Without dead ends: 170 [2018-09-26 21:37:36,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:37:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-26 21:37:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-09-26 21:37:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-26 21:37:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-09-26 21:37:36,110 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-09-26 21:37:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:36,110 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-09-26 21:37:36,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:37:36,111 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-09-26 21:37:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:37:36,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:36,111 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-09-26 21:37:36,111 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:36,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-09-26 21:37:36,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:36,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:36,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:36,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:36,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:37,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:37,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:37,209 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:37:37,306 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-09-26 21:37:37,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:37,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:37,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:37,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:37:37,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:37:37,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:37:37,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:37:37,360 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-09-26 21:37:37,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:37,721 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-09-26 21:37:37,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:37:37,721 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-26 21:37:37,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:37,722 INFO L225 Difference]: With dead ends: 174 [2018-09-26 21:37:37,722 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:37:37,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:37:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:37:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 21:37:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:37:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-26 21:37:37,730 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-09-26 21:37:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:37,730 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-26 21:37:37,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:37:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-26 21:37:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:37:37,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:37,731 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-09-26 21:37:37,731 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:37,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:37,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-09-26 21:37:37,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:37,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:37,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:37,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:37,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:38,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:38,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:38,897 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:37:38,981 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-26 21:37:38,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:38,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:39,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:39,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:37:39,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:37:39,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:37:39,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:37:39,033 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-09-26 21:37:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:39,216 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-09-26 21:37:39,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:37:39,217 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-26 21:37:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:39,217 INFO L225 Difference]: With dead ends: 119 [2018-09-26 21:37:39,217 INFO L226 Difference]: Without dead ends: 116 [2018-09-26 21:37:39,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:37:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-26 21:37:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-26 21:37:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-26 21:37:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-09-26 21:37:39,225 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-09-26 21:37:39,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:39,225 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-09-26 21:37:39,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:37:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-09-26 21:37:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-26 21:37:39,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:39,226 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-09-26 21:37:39,226 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:39,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:39,226 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-09-26 21:37:39,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:39,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:39,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:39,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:39,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:40,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:40,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:40,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:37:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:40,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:40,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:40,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:37:40,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:37:40,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:37:40,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:37:40,879 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. [2018-09-26 21:37:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:44,615 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-26 21:37:44,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:37:44,615 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2018-09-26 21:37:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:44,616 INFO L225 Difference]: With dead ends: 176 [2018-09-26 21:37:44,616 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:37:44,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:37:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:37:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2018-09-26 21:37:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-26 21:37:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-09-26 21:37:44,624 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2018-09-26 21:37:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:44,624 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-09-26 21:37:44,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:37:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-09-26 21:37:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:37:44,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:44,625 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-09-26 21:37:44,625 INFO L423 AbstractCegarLoop]: === Iteration 167 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:44,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:44,625 INFO L82 PathProgramCache]: Analyzing trace with hash -827466963, now seen corresponding path program 164 times [2018-09-26 21:37:44,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:44,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:44,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:44,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:37:44,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:45,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:45,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:45,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:37:45,825 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:37:45,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:45,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:45,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:45,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:37:45,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:37:45,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:37:45,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:37:45,879 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 59 states. [2018-09-26 21:37:46,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:46,438 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2018-09-26 21:37:46,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:37:46,439 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-26 21:37:46,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:46,439 INFO L225 Difference]: With dead ends: 177 [2018-09-26 21:37:46,439 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:37:46,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:37:46,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:37:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:37:46,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:37:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-26 21:37:46,450 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2018-09-26 21:37:46,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:46,450 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-26 21:37:46,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:37:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-26 21:37:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:37:46,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:46,451 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1] [2018-09-26 21:37:46,451 INFO L423 AbstractCegarLoop]: === Iteration 168 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:46,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:46,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2128304441, now seen corresponding path program 165 times [2018-09-26 21:37:46,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:46,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:46,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:46,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:46,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:47,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:47,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:47,679 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:37:47,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-26 21:37:47,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:47,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:47,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:47,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:37:47,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:37:47,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:37:47,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:37:47,819 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 59 states. [2018-09-26 21:37:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:48,003 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-26 21:37:48,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:37:48,003 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-26 21:37:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:48,004 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:37:48,004 INFO L226 Difference]: Without dead ends: 118 [2018-09-26 21:37:48,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:37:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-26 21:37:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-26 21:37:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-26 21:37:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-09-26 21:37:48,012 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2018-09-26 21:37:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:48,012 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-09-26 21:37:48,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:37:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-09-26 21:37:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-26 21:37:48,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:48,013 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1] [2018-09-26 21:37:48,013 INFO L423 AbstractCegarLoop]: === Iteration 169 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:48,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:48,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1552989753, now seen corresponding path program 166 times [2018-09-26 21:37:48,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:48,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:48,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:48,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:48,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:49,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:49,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:49,623 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:37:49,694 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:37:49,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:49,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:49,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:49,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:37:49,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:37:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:37:49,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:37:49,749 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 59 states. [2018-09-26 21:37:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:53,625 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2018-09-26 21:37:53,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:37:53,625 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2018-09-26 21:37:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:53,626 INFO L225 Difference]: With dead ends: 179 [2018-09-26 21:37:53,626 INFO L226 Difference]: Without dead ends: 176 [2018-09-26 21:37:53,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:37:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-26 21:37:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 120. [2018-09-26 21:37:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-26 21:37:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-09-26 21:37:53,634 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2018-09-26 21:37:53,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:53,634 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-09-26 21:37:53,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:37:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-09-26 21:37:53,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:37:53,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:53,635 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-09-26 21:37:53,635 INFO L423 AbstractCegarLoop]: === Iteration 170 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:53,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:53,635 INFO L82 PathProgramCache]: Analyzing trace with hash -898103609, now seen corresponding path program 167 times [2018-09-26 21:37:53,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:53,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:53,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:53,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:53,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:54,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:54,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:54,818 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:37:54,921 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-26 21:37:54,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:54,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:54,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:54,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:37:54,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:37:54,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:37:54,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:37:54,984 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 60 states. [2018-09-26 21:37:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:55,488 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-09-26 21:37:55,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:37:55,488 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-26 21:37:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:55,489 INFO L225 Difference]: With dead ends: 180 [2018-09-26 21:37:55,489 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:37:55,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:37:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:37:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-26 21:37:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:37:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-26 21:37:55,497 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 118 [2018-09-26 21:37:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:55,497 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-26 21:37:55,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:37:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-26 21:37:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:37:55,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:55,498 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1] [2018-09-26 21:37:55,498 INFO L423 AbstractCegarLoop]: === Iteration 171 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:55,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:55,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1725607533, now seen corresponding path program 168 times [2018-09-26 21:37:55,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:55,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:55,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:55,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:55,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:37:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:56,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:37:56,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:37:56,774 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:37:56,866 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-09-26 21:37:56,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:37:56,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:37:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:37:56,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:37:56,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:37:56,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:37:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:37:56,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:37:56,913 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-09-26 21:37:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:37:57,103 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2018-09-26 21:37:57,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:37:57,103 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-26 21:37:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:37:57,104 INFO L225 Difference]: With dead ends: 123 [2018-09-26 21:37:57,104 INFO L226 Difference]: Without dead ends: 120 [2018-09-26 21:37:57,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 174 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 21:37:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-26 21:37:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-26 21:37:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-26 21:37:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-09-26 21:37:57,113 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 118 [2018-09-26 21:37:57,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:37:57,113 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-09-26 21:37:57,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:37:57,113 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-09-26 21:37:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-26 21:37:57,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:37:57,114 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1] [2018-09-26 21:37:57,114 INFO L423 AbstractCegarLoop]: === Iteration 172 === [MainErr0ASSERT_VIOLATIONASSERT, MainErr1ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:37:57,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:37:57,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1954164449, now seen corresponding path program 169 times [2018-09-26 21:37:57,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:37:57,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:37:57,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:57,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:37:57,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:37:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 21:37:58,407 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:37:58,411 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:37:58,411 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:37:58 BoogieIcfgContainer [2018-09-26 21:37:58,411 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:37:58,412 INFO L168 Benchmark]: Toolchain (without parser) took 235451.08 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -166.2 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 441.1 MB). Peak memory consumption was 275.0 MB. Max. memory is 7.1 GB. [2018-09-26 21:37:58,414 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:37:58,414 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.10 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:37:58,414 INFO L168 Benchmark]: Boogie Preprocessor took 23.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:37:58,415 INFO L168 Benchmark]: RCFGBuilder took 373.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:37:58,415 INFO L168 Benchmark]: TraceAbstraction took 235006.21 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -166.2 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 420.0 MB). Peak memory consumption was 253.8 MB. Max. memory is 7.1 GB. [2018-09-26 21:37:58,417 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 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.10 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 373.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235006.21 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -166.2 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 420.0 MB). Peak memory consumption was 253.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was analyzing trace of length 120 with TraceHistMax 57, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 52 known predicates. - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was analyzing trace of length 120 with TraceHistMax 57, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 52 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 234.9s OverallTime, 172 OverallIterations, 57 TraceHistogramMax, 108.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 687 SDtfs, 1599 SDslu, 6279 SDs, 0 SdLazy, 161993 SolverSat, 2002 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20333 GetRequests, 15149 SyntacticMatches, 112 SemanticMatches, 5072 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3192 ImplicationChecksByTransitivity, 101.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=169, 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: 0.8s AutomataMinimizationTime, 171 MinimizatonAttempts, 1596 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.9s SatisfiabilityAnalysisTime, 107.1s InterpolantComputationTime, 21071 NumberOfCodeBlocks, 21071 NumberOfCodeBlocksAsserted, 1641 NumberOfCheckSat, 20732 ConstructedInterpolants, 0 QuantifiedInterpolants, 6983148 SizeOfPredicates, 112 NumberOfNonLiveVariables, 45612 ConjunctsInSsa, 13272 ConjunctsInUnsatCore, 339 InterpolantComputations, 3 PerfectInterpolantSequences, 130033/376881 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/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-37-58-425.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-37-58-425.csv Completed graceful shutdown