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_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:49:25,738 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:49:25,740 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:49:25,752 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:49:25,752 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:49:25,753 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:49:25,754 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:49:25,756 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:49:25,758 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:49:25,759 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:49:25,760 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:49:25,784 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 20:49:25,799 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:49:25,800 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:49:25,800 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:49:25,801 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:49:25,801 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:49:25,802 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:49:25,802 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:49:25,802 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:49:25,802 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:49:25,802 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:49:25,803 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:49:25,803 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:49:25,803 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:49:25,803 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:49:25,803 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:49:25,804 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:49:25,804 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:49:25,804 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:49:25,804 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:49:25,804 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:49:25,804 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:49:25,805 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:49:25,805 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:49:25,805 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:49:25,805 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:49:25,806 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:49:25,806 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:49:25,806 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:49:25,806 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:49:25,806 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:49:25,806 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:49:25,849 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:49:25,864 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:49:25,869 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:49:25,871 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:49:25,871 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:49:25,872 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl [2018-09-30 20:49:25,872 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl' [2018-09-30 20:49:25,924 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:49:25,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:49:25,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:49:25,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:49:25,930 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:49:25,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:25" (1/1) ... [2018-09-30 20:49:25,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:25" (1/1) ... [2018-09-30 20:49:25,968 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:49:25,968 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:49:25,968 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:49:25,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:49:25,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:49:25,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:49:25,971 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:49:25,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:25" (1/1) ... [2018-09-30 20:49:25,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:25" (1/1) ... [2018-09-30 20:49:25,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:25" (1/1) ... [2018-09-30 20:49:25,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:25" (1/1) ... [2018-09-30 20:49:25,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:25" (1/1) ... [2018-09-30 20:49:25,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:25" (1/1) ... [2018-09-30 20:49:25,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:25" (1/1) ... [2018-09-30 20:49:25,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:49:25,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:49:25,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:49:25,998 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:49:25,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:49:26,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 20:49:26,063 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 20:49:26,208 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:49:26,208 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:49:26 BoogieIcfgContainer [2018-09-30 20:49:26,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:49:26,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:49:26,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:49:26,213 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:49:26,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:49:25" (1/2) ... [2018-09-30 20:49:26,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca924ce and model type LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:49:26, skipping insertion in model container [2018-09-30 20:49:26,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:49:26" (2/2) ... [2018-09-30 20:49:26,216 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-Reduced.bpl [2018-09-30 20:49:26,226 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:49:26,234 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:49:26,286 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:49:26,287 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:49:26,287 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:49:26,287 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:49:26,287 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:49:26,287 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:49:26,288 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:49:26,288 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:49:26,288 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:49:26,303 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 20:49:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:49:26,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:26,311 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:49:26,312 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:26,319 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:26,320 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-30 20:49:26,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:26,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:26,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:26,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:26,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:26,489 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:49:26,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 20:49:26,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:49:26,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:49:26,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:26,507 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 20:49:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:26,755 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:49:26,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:49:26,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 20:49:26,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:26,770 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:49:26,771 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:49:26,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:49:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:49:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:49:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:49:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:49:26,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-30 20:49:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:26,817 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:49:26,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:49:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:49:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:49:26,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:26,818 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 20:49:26,818 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:26,818 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:26,818 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-30 20:49:26,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:26,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:26,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:26,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:26,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:26,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:26,900 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) [2018-09-30 20:49:26,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:26,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:27,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:27,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 20:49:27,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:49:27,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:49:27,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:27,159 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 20:49:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:27,405 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:49:27,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:49:27,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 20:49:27,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:27,407 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:49:27,408 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:49:27,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:49:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:49:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:49:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 20:49:27,421 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-30 20:49:27,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:27,421 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 20:49:27,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:49:27,422 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 20:49:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:49:27,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:27,423 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-30 20:49:27,423 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:27,423 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-30 20:49:27,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:27,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:27,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:27,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:27,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:27,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:27,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:27,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:27,604 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:27,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:27,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:27,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:27,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 20:49:27,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:49:27,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:49:27,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:27,889 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 20:49:28,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:28,029 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:49:28,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:49:28,030 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 20:49:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:28,030 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:49:28,031 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:49:28,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:28,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:49:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:49:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:49:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:49:28,035 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-30 20:49:28,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:28,035 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:49:28,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:49:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:49:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:49:28,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:28,037 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-30 20:49:28,037 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:28,037 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:28,037 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-30 20:49:28,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:28,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:28,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:28,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:28,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:28,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:28,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:28,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:28,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:49:28,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:28,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:28,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:28,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 20:49:28,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:49:28,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:49:28,396 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:28,396 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 20:49:28,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:28,552 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:49:28,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:49:28,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 20:49:28,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:28,554 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:49:28,554 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:49:28,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:49:28,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:49:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:49:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:49:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 20:49:28,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-30 20:49:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:28,559 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 20:49:28,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:49:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 20:49:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:49:28,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:28,560 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-30 20:49:28,560 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:28,560 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-30 20:49:28,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:28,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:28,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:28,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:28,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:28,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:28,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:28,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:28,870 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:28,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:28,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:29,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:29,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 20:49:29,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:49:29,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:49:29,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:29,168 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 20:49:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:29,439 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:49:29,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:49:29,440 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 20:49:29,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:29,441 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:49:29,441 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:49:29,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:29,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:49:29,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:49:29,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:49:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 20:49:29,451 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-30 20:49:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:29,452 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 20:49:29,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:49:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 20:49:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:49:29,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:29,453 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-30 20:49:29,453 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:29,453 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:29,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-30 20:49:29,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:29,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:29,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:29,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:29,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:29,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:29,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:29,586 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:29,595 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:49:29,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:29,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:29,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:29,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 20:49:29,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:49:29,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:49:29,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:29,717 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 20:49:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:29,952 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:49:29,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:49:29,953 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 20:49:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:29,954 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:49:29,954 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:49:29,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:49:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:49:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:49:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 20:49:29,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-30 20:49:29,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:29,959 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 20:49:29,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:49:29,959 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 20:49:29,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:49:29,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:29,960 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-30 20:49:29,961 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:29,961 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:29,961 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-30 20:49:29,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:29,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:29,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:29,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:29,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:30,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:30,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:30,082 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:30,092 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:49:30,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:30,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:30,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:30,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 20:49:30,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:49:30,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:49:30,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:30,391 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 20:49:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:30,519 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:49:30,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:49:30,520 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 20:49:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:30,521 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:49:30,521 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:49:30,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:49:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:49:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:49:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 20:49:30,526 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-30 20:49:30,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:30,526 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 20:49:30,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:49:30,526 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 20:49:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:49:30,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:30,527 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-30 20:49:30,527 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:30,528 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:30,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-30 20:49:30,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:30,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:30,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:30,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:30,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:30,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:30,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:30,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:30,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:30,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:30,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 20:49:30,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:49:30,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:49:30,810 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:30,810 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 20:49:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:30,948 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:49:30,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:49:30,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 20:49:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:30,949 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:49:30,949 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:49:30,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:49:30,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:49:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:49:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 20:49:30,954 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-30 20:49:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:30,955 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 20:49:30,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:49:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 20:49:30,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:49:30,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:30,955 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-30 20:49:30,956 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:30,956 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:30,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-30 20:49:30,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:30,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:30,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:30,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:30,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:31,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:31,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:31,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:31,091 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:31,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:31,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:31,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:31,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 20:49:31,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:49:31,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:49:31,251 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:31,251 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 20:49:31,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:31,424 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:49:31,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:49:31,425 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 20:49:31,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:31,426 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:49:31,427 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:49:31,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:49:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:49:31,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:49:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:49:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 20:49:31,431 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-30 20:49:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:31,432 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 20:49:31,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:49:31,432 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 20:49:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:49:31,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:31,433 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-30 20:49:31,433 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:31,434 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:31,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-30 20:49:31,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:31,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:31,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:31,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:31,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:31,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:31,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:31,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:31,654 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:49:31,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:31,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:31,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:31,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 20:49:31,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:49:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:49:31,940 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:31,940 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 20:49:32,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:32,306 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:49:32,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:49:32,307 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 20:49:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:32,307 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:49:32,308 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:49:32,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:32,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:49:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:49:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:49:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 20:49:32,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-30 20:49:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:32,313 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 20:49:32,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:49:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 20:49:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:49:32,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:32,314 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-30 20:49:32,314 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:32,314 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:32,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-30 20:49:32,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:32,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:32,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:32,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:32,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:32,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:32,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:32,435 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:32,443 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:32,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:32,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:32,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:32,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 20:49:32,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:49:32,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:49:32,799 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:32,799 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 20:49:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:33,049 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:49:33,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:49:33,049 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 20:49:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:33,050 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:49:33,050 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:49:33,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:49:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:49:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:49:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 20:49:33,056 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-30 20:49:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:33,056 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 20:49:33,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:49:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 20:49:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:49:33,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:33,057 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-30 20:49:33,058 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:33,058 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:33,058 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-30 20:49:33,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:33,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:33,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:33,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:33,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:33,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:33,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:33,298 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:33,313 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:49:33,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:33,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:33,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:33,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 20:49:33,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:49:33,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:49:33,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:33,649 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 20:49:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:33,846 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:49:33,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:49:33,847 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 20:49:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:33,848 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:49:33,848 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:49:33,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:49:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:49:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:49:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 20:49:33,854 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-30 20:49:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:33,854 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 20:49:33,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:49:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 20:49:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:49:33,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:33,855 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-30 20:49:33,855 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:33,855 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:33,855 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-30 20:49:33,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:33,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:33,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:33,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:33,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:34,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:34,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:34,032 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:34,098 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:49:34,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:34,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:34,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:34,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 20:49:34,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:49:34,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:49:34,321 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:34,321 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 20:49:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:34,491 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:49:34,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:49:34,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 20:49:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:34,492 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:49:34,492 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:49:34,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:34,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:49:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:49:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:49:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 20:49:34,498 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-30 20:49:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:34,498 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 20:49:34,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:49:34,499 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 20:49:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:49:34,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:34,499 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-30 20:49:34,500 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:34,500 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:34,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-30 20:49:34,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:34,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:34,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:34,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:34,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:34,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:34,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:34,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:34,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:35,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:35,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 20:49:35,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:49:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:49:35,202 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:35,202 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 20:49:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:35,584 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:49:35,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:49:35,585 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 20:49:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:35,586 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:49:35,586 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:49:35,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:49:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:49:35,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:49:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:49:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 20:49:35,592 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-30 20:49:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:35,592 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 20:49:35,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:49:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 20:49:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:49:35,593 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:35,593 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-30 20:49:35,593 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:35,593 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:35,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-30 20:49:35,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:35,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:35,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:35,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:35,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:35,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:35,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:35,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:35,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:35,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:35,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:36,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:36,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 20:49:36,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:49:36,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:49:36,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:36,062 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 20:49:36,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:36,386 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:49:36,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:49:36,386 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 20:49:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:36,387 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:49:36,387 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:49:36,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:49:36,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:49:36,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:49:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:49:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 20:49:36,392 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-30 20:49:36,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:36,392 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 20:49:36,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:49:36,393 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 20:49:36,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:49:36,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:36,393 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-30 20:49:36,394 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:36,394 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:36,394 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-30 20:49:36,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:36,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:36,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:36,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:36,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:36,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:36,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:36,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:36,739 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:49:36,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:36,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:37,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:37,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 20:49:37,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:49:37,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:49:37,486 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:37,486 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 20:49:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:37,728 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:49:37,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:49:37,729 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 20:49:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:37,730 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:49:37,730 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:49:37,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:49:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:49:37,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:49:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:49:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 20:49:37,736 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-30 20:49:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:37,736 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 20:49:37,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:49:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 20:49:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:49:37,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:37,737 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-30 20:49:37,737 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:37,738 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:37,738 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-30 20:49:37,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:37,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:37,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:37,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:37,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:37,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:37,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:37,925 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:37,936 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:37,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:37,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:38,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:38,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 20:49:38,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:49:38,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:49:38,263 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:38,263 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 20:49:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:38,622 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:49:38,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:49:38,622 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 20:49:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:38,623 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:49:38,623 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:49:38,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:49:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:49:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:49:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 20:49:38,628 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-30 20:49:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:38,628 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 20:49:38,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:49:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 20:49:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:49:38,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:38,629 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-30 20:49:38,629 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:38,630 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-30 20:49:38,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:38,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:38,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:38,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:38,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:38,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:38,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:38,910 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:38,982 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:49:38,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:38,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:39,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:39,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 20:49:39,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:49:39,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:49:39,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:39,274 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 20:49:39,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:39,607 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:49:39,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:49:39,608 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 20:49:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:39,609 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:49:39,609 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:49:39,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:49:39,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:49:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:49:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 20:49:39,615 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-30 20:49:39,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:39,615 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 20:49:39,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:49:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 20:49:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:49:39,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:39,617 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-30 20:49:39,617 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:39,617 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:39,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-30 20:49:39,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:39,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:39,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:39,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:39,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:39,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:39,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:39,793 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:39,821 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:49:39,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:39,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:40,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:40,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 20:49:40,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:49:40,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:49:40,175 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:40,175 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 20:49:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:40,509 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:49:40,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:49:40,510 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 20:49:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:40,511 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:49:40,511 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:49:40,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:49:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 20:49:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:49:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 20:49:40,515 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-30 20:49:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:40,516 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 20:49:40,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:49:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 20:49:40,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:49:40,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:40,517 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-30 20:49:40,517 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:40,517 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:40,517 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-30 20:49:40,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:40,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:40,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:40,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:40,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:40,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:40,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:40,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:40,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:41,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:41,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 20:49:41,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:49:41,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:49:41,017 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:41,018 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 20:49:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:41,365 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:49:41,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:49:41,365 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 20:49:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:41,366 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:49:41,366 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:49:41,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:41,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:49:41,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 20:49:41,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:49:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 20:49:41,374 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-30 20:49:41,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:41,374 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 20:49:41,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:49:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 20:49:41,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:49:41,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:41,375 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-30 20:49:41,375 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:41,375 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:41,376 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-30 20:49:41,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:41,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:41,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:41,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:41,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:41,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:41,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:41,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:41,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:41,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:41,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:42,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:42,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 20:49:42,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:49:42,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:49:42,150 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:42,150 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 20:49:42,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:42,537 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:49:42,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:49:42,538 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 20:49:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:42,539 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:49:42,539 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:49:42,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:49:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:49:42,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:49:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:49:42,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 20:49:42,545 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-30 20:49:42,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:42,546 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 20:49:42,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:49:42,546 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 20:49:42,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 20:49:42,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:42,547 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-30 20:49:42,547 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:42,547 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:42,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-30 20:49:42,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:42,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:42,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:42,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:42,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:43,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:43,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:43,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:43,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:49:43,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:43,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:43,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:43,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 20:49:43,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:49:43,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:49:43,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:43,748 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 20:49:44,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:44,055 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:49:44,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:49:44,058 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 20:49:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:44,059 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:49:44,059 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 20:49:44,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:49:44,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 20:49:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 20:49:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:49:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 20:49:44,064 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-30 20:49:44,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:44,064 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 20:49:44,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:49:44,065 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 20:49:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:49:44,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:44,066 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-30 20:49:44,066 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:44,066 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-30 20:49:44,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:44,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:44,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:44,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:44,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:44,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:44,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:44,323 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:44,338 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:44,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:44,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:44,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:44,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 20:49:44,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:49:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:49:44,616 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:44,616 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 20:49:44,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:44,910 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:49:44,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:49:44,910 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 20:49:44,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:44,911 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:49:44,911 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:49:44,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:49:44,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 20:49:44,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:49:44,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 20:49:44,916 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-30 20:49:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:44,917 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 20:49:44,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:49:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 20:49:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 20:49:44,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:44,918 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-30 20:49:44,918 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:44,918 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:44,918 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-30 20:49:44,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:44,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:44,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:44,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:44,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:45,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:45,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:45,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:45,235 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 20:49:45,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:45,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:45,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:45,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 20:49:45,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:49:45,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:49:45,609 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:45,609 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 20:49:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:45,953 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:49:45,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:49:45,954 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 20:49:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:45,955 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:49:45,955 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 20:49:45,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:49:45,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 20:49:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 20:49:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:49:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 20:49:45,960 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-30 20:49:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:45,960 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 20:49:45,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:49:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 20:49:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:49:45,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:45,961 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-30 20:49:45,962 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:45,962 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:45,962 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-30 20:49:45,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:45,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:45,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:45,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:45,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:46,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:46,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:46,258 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:46,279 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:49:46,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:46,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:46,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:46,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 20:49:46,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:49:46,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:49:46,591 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:46,591 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 20:49:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:46,911 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:49:46,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:49:46,912 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 20:49:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:46,913 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:49:46,913 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 20:49:46,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:49:46,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 20:49:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 20:49:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:49:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 20:49:46,917 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-30 20:49:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:46,917 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 20:49:46,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:49:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 20:49:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:49:46,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:46,918 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-30 20:49:46,918 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:46,919 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-30 20:49:46,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:46,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:46,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:46,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:46,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:47,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:47,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:47,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:47,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:47,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:47,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 20:49:47,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:49:47,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:49:47,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:47,465 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 20:49:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:47,804 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:49:47,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:49:47,805 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 20:49:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:47,806 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:49:47,806 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:49:47,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:49:47,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 20:49:47,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:49:47,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 20:49:47,813 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-30 20:49:47,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:47,813 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 20:49:47,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:49:47,813 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 20:49:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 20:49:47,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:47,814 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-30 20:49:47,814 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:47,814 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:47,815 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-30 20:49:47,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:47,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:47,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:47,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:47,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:48,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:48,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:48,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:48,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:48,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:48,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:48,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:48,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 20:49:48,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:49:48,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:49:48,416 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:48,416 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 20:49:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:48,920 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:49:48,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:49:48,921 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 20:49:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:48,922 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:49:48,922 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:49:48,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:49:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:49:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 20:49:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 20:49:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 20:49:48,926 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-30 20:49:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:48,926 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 20:49:48,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:49:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 20:49:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 20:49:48,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:48,927 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-30 20:49:48,927 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:48,927 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:48,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-30 20:49:48,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:48,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:48,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:48,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:48,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:49,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:49,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:49,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:49,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:49:49,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:49,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:49,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:49,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 20:49:49,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:49:49,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:49:49,524 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:49,524 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 20:49:49,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:49,863 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:49:49,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:49:49,864 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 20:49:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:49,864 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:49:49,865 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 20:49:49,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 20:49:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 20:49:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 20:49:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 20:49:49,869 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-30 20:49:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:49,869 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 20:49:49,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:49:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 20:49:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 20:49:49,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:49,870 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-30 20:49:49,870 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:49,871 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:49,871 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-30 20:49:49,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:49,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:49,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:49,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:49,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:50,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:50,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:50,055 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:50,072 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:50,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:50,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:51,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:51,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 20:49:51,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:49:51,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:49:51,859 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:51,859 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 20:49:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:52,417 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:49:52,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:49:52,424 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 20:49:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:52,424 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:49:52,424 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 20:49:52,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:49:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 20:49:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 20:49:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 20:49:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 20:49:52,428 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-30 20:49:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:52,428 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 20:49:52,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:49:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 20:49:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 20:49:52,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:52,429 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-30 20:49:52,429 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:52,429 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:52,430 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-30 20:49:52,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:52,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:52,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:52,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:52,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:52,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:52,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:52,645 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:52,671 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:49:52,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:52,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:53,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:53,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 20:49:53,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:49:53,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:49:53,033 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:53,033 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 20:49:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:53,604 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:49:53,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:49:53,605 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 20:49:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:53,605 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:49:53,605 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 20:49:53,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:49:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 20:49:53,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 20:49:53,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 20:49:53,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 20:49:53,609 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-30 20:49:53,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:53,609 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 20:49:53,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:49:53,609 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 20:49:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 20:49:53,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:53,610 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-30 20:49:53,610 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:53,610 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:53,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-30 20:49:53,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:53,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:53,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:53,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:53,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:53,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:53,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:53,913 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:53,983 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:49:53,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:53,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:54,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:54,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 20:49:54,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:49:54,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:49:54,362 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:54,362 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 20:49:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:54,843 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 20:49:54,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:49:54,844 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 20:49:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:54,844 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:49:54,845 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:49:54,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:49:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:49:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 20:49:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:49:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 20:49:54,848 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-30 20:49:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:54,849 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 20:49:54,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:49:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 20:49:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:49:54,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:54,849 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-30 20:49:54,850 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:54,850 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:54,850 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-30 20:49:54,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:54,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:54,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:54,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:54,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:55,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:55,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:55,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:55,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:55,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:55,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 20:49:55,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:49:55,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:49:55,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:55,649 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 20:49:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:56,072 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:49:56,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:49:56,073 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 20:49:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:56,074 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:49:56,074 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:49:56,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:49:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:49:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 20:49:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 20:49:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 20:49:56,077 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-30 20:49:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:56,078 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 20:49:56,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:49:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 20:49:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 20:49:56,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:56,078 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-30 20:49:56,079 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:56,079 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:56,079 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-30 20:49:56,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:56,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:56,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:56,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:56,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:56,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:56,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:56,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:56,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:56,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:56,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:57,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:57,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 20:49:57,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:49:57,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:49:57,174 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:57,174 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 20:49:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:57,667 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 20:49:57,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:49:57,668 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 20:49:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:57,669 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:49:57,669 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 20:49:57,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:49:57,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 20:49:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 20:49:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:49:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 20:49:57,673 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-30 20:49:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:57,673 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 20:49:57,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:49:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 20:49:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 20:49:57,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:57,674 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-30 20:49:57,674 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:57,674 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:57,675 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-30 20:49:57,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:57,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:57,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:57,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:57,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:58,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:58,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:58,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:58,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 20:49:58,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:58,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:58,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:58,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 20:49:58,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:49:58,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:49:58,531 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:58,531 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 20:49:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:59,200 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:49:59,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:49:59,200 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 20:49:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:59,202 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:49:59,202 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 20:49:59,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:49:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 20:49:59,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 20:49:59,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 20:49:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 20:49:59,206 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-30 20:49:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:59,206 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 20:49:59,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:49:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 20:49:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 20:49:59,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:59,206 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-30 20:49:59,207 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:59,207 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:59,207 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-30 20:49:59,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:59,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:59,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:59,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:59,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:59,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:59,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:59,490 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:59,510 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:59,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:59,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:59,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:59,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 20:49:59,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:49:59,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:49:59,925 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:59,925 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 20:50:00,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:00,351 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 20:50:00,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:50:00,352 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 20:50:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:00,353 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:50:00,353 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:50:00,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:50:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:50:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 20:50:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 20:50:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 20:50:00,358 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-30 20:50:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:00,358 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 20:50:00,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:50:00,358 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 20:50:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 20:50:00,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:00,359 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-30 20:50:00,359 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:00,359 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:00,359 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-30 20:50:00,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:00,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:00,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:00,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:00,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:00,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:00,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:00,916 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:00,950 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 20:50:00,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:00,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:01,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:01,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 20:50:01,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:50:01,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:50:01,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:01,414 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 20:50:02,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:02,389 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:50:02,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:50:02,390 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 20:50:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:02,391 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:50:02,391 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 20:50:02,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:50:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 20:50:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 20:50:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:50:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 20:50:02,395 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-30 20:50:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:02,395 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 20:50:02,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:50:02,396 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 20:50:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 20:50:02,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:02,396 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-30 20:50:02,396 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:02,397 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:02,397 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-30 20:50:02,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:02,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:02,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:02,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:02,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:02,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:02,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:02,731 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:02,769 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:50:02,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:02,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:03,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:03,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 20:50:03,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:50:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:50:03,228 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:03,229 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 20:50:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:03,710 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 20:50:03,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:50:03,710 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 20:50:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:03,711 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:50:03,711 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 20:50:03,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:50:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 20:50:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 20:50:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 20:50:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 20:50:03,714 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-30 20:50:03,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:03,715 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 20:50:03,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:50:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 20:50:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 20:50:03,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:03,716 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-30 20:50:03,716 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:03,716 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-30 20:50:03,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:03,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:03,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:03,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:03,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:04,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:04,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:04,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:04,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:04,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:04,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 20:50:04,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:50:04,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:50:04,707 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:04,707 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 20:50:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:05,330 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:50:05,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:50:05,331 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 20:50:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:05,332 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:50:05,332 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 20:50:05,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:50:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 20:50:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 20:50:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:50:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 20:50:05,336 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-30 20:50:05,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:05,336 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 20:50:05,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:50:05,336 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 20:50:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 20:50:05,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:05,336 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-30 20:50:05,337 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:05,337 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-30 20:50:05,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:05,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:05,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:05,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:05,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:05,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:05,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:05,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:05,743 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:05,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:05,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:06,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:06,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 20:50:06,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:50:06,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:50:06,200 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:06,200 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 20:50:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:06,790 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 20:50:06,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:50:06,791 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 20:50:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:06,792 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:50:06,792 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:50:06,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:50:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:50:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 20:50:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 20:50:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 20:50:06,796 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-30 20:50:06,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:06,796 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 20:50:06,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:50:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 20:50:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 20:50:06,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:06,797 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-30 20:50:06,797 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:06,798 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:06,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-30 20:50:06,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:06,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:06,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:06,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:06,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:07,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:07,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:07,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:50:07,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 20:50:07,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:07,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:07,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:07,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-30 20:50:07,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:50:07,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:50:07,803 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:07,803 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 20:50:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:08,409 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:50:08,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:50:08,410 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 20:50:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:08,411 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:50:08,411 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 20:50:08,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:50:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 20:50:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 20:50:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:50:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 20:50:08,415 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-30 20:50:08,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:08,415 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 20:50:08,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:50:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 20:50:08,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:50:08,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:08,416 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-30 20:50:08,416 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:08,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-30 20:50:08,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:08,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:08,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:08,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:08,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:08,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:08,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:08,807 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:50:08,831 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:50:08,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:08,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:09,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:09,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 20:50:09,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:50:09,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:50:09,514 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:09,514 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-30 20:50:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:10,208 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 20:50:10,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:50:10,209 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-30 20:50:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:10,209 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:50:10,210 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:50:10,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:50:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:50:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 20:50:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:50:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 20:50:10,214 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-30 20:50:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:10,214 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 20:50:10,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:50:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 20:50:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 20:50:10,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:10,215 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-30 20:50:10,215 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:10,216 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:10,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-30 20:50:10,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:10,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:10,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:10,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:10,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:10,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:10,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:10,683 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:10,726 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 20:50:10,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:10,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:11,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:11,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-30 20:50:11,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:50:11,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:50:11,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:11,381 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-30 20:50:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:11,942 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:50:11,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:50:11,943 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-30 20:50:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:11,944 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:50:11,944 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 20:50:11,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:50:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 20:50:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 20:50:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:50:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 20:50:11,948 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-30 20:50:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:11,949 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 20:50:11,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:50:11,949 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 20:50:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 20:50:11,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:11,949 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-30 20:50:11,950 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:11,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:11,950 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-30 20:50:11,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:11,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:11,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:11,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:11,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:12,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:12,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:12,367 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:12,413 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:50:12,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:12,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:13,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:13,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-30 20:50:13,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:50:13,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:50:13,099 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:13,099 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-30 20:50:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:13,672 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 20:50:13,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:50:13,673 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-30 20:50:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:13,674 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:50:13,674 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 20:50:13,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:50:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 20:50:13,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 20:50:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 20:50:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 20:50:13,678 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-30 20:50:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:13,678 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 20:50:13,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:50:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 20:50:13,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 20:50:13,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:13,679 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-30 20:50:13,679 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:13,679 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:13,680 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-30 20:50:13,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:13,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:13,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:13,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:13,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:15,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:15,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:15,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:15,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:15,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:15,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-30 20:50:15,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:50:15,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:50:15,580 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:15,580 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-30 20:50:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:16,166 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:50:16,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:50:16,166 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-30 20:50:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:16,167 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:50:16,167 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 20:50:16,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:50:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 20:50:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 20:50:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 20:50:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 20:50:16,171 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-30 20:50:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:16,171 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 20:50:16,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:50:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 20:50:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 20:50:16,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:16,172 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-30 20:50:16,172 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:16,172 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-30 20:50:16,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:16,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:16,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:16,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:16,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:16,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:16,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:16,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:16,575 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:16,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:16,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:17,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:17,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-30 20:50:17,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:50:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:50:17,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:17,255 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-30 20:50:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:17,894 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 20:50:17,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:50:17,895 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-30 20:50:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:17,896 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:50:17,896 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:50:17,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:50:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:50:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 20:50:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:50:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 20:50:17,900 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-30 20:50:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:17,901 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 20:50:17,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:50:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 20:50:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:50:17,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:17,902 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-30 20:50:17,902 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:17,902 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-30 20:50:17,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:17,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:17,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:17,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:17,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:18,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:18,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:18,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:50:18,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 20:50:18,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:18,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:19,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:19,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-30 20:50:19,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:50:19,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:50:19,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:19,026 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-30 20:50:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:19,711 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:50:19,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:50:19,712 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-30 20:50:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:19,712 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:50:19,713 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:50:19,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:50:19,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:50:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 20:50:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 20:50:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 20:50:19,716 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-30 20:50:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:19,716 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 20:50:19,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:50:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 20:50:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 20:50:19,717 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:19,717 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-30 20:50:19,717 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:19,717 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-30 20:50:19,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:19,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:19,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:19,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:19,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:20,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:20,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:20,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:50:20,048 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:50:20,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:20,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:20,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:20,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-30 20:50:20,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:50:20,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:50:20,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:20,744 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-30 20:50:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:21,322 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 20:50:21,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:50:21,322 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-30 20:50:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:21,323 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:50:21,323 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:50:21,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:50:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:50:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 20:50:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 20:50:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 20:50:21,327 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-30 20:50:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:21,328 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 20:50:21,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:50:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 20:50:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 20:50:21,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:21,329 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-30 20:50:21,329 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:21,329 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:21,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-30 20:50:21,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:21,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:21,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:21,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:21,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:22,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:22,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:22,181 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:22,230 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 20:50:22,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:22,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:23,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:23,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-30 20:50:23,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 20:50:23,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 20:50:23,007 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:23,007 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-30 20:50:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:23,624 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:50:23,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:50:23,624 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-30 20:50:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:23,626 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:50:23,626 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 20:50:23,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:50:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 20:50:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 20:50:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:50:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 20:50:23,630 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-30 20:50:23,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:23,630 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 20:50:23,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 20:50:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 20:50:23,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 20:50:23,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:23,631 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-30 20:50:23,632 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:23,632 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:23,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-30 20:50:23,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:23,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:23,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:23,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:23,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:23,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:23,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:24,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:24,056 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:50:24,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:24,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:24,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:24,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-30 20:50:24,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 20:50:24,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 20:50:24,850 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:24,850 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-30 20:50:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:25,415 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 20:50:25,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:50:25,415 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-30 20:50:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:25,416 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:50:25,416 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 20:50:25,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:50:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 20:50:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 20:50:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 20:50:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 20:50:25,420 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-30 20:50:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:25,420 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 20:50:25,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 20:50:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 20:50:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 20:50:25,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:25,421 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-30 20:50:25,421 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:25,421 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-30 20:50:25,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:25,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:25,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:25,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:25,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:25,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:25,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:25,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:26,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:27,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:27,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-30 20:50:27,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:50:27,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:50:27,879 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:27,879 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-30 20:50:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:28,467 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:50:28,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:50:28,467 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-30 20:50:28,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:28,468 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:50:28,468 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:50:28,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-09-30 20:50:28,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:50:28,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 20:50:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 20:50:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 20:50:28,473 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-30 20:50:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:28,474 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 20:50:28,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:50:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 20:50:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 20:50:28,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:28,475 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-30 20:50:28,475 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:28,475 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:28,475 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-30 20:50:28,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:28,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:28,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:28,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:28,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:28,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:28,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:28,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:28,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:28,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:28,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:29,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:29,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-30 20:50:29,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 20:50:29,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 20:50:29,792 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:29,792 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-30 20:50:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:31,717 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 20:50:31,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:50:31,718 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-30 20:50:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:31,719 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:50:31,719 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:50:31,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:50:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:50:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 20:50:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:50:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 20:50:31,723 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-30 20:50:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:31,724 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 20:50:31,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 20:50:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 20:50:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 20:50:31,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:31,725 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-30 20:50:31,725 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:31,725 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:31,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-30 20:50:31,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:31,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:31,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:31,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:31,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:32,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:32,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:32,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:50:32,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 20:50:32,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:32,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:32,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:32,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-30 20:50:32,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:50:32,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:50:32,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:32,887 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-30 20:50:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:33,654 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 20:50:33,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:50:33,654 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-30 20:50:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:33,656 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:50:33,656 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 20:50:33,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:50:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 20:50:33,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 20:50:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:50:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 20:50:33,661 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-30 20:50:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:33,662 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 20:50:33,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:50:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 20:50:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:50:33,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:33,662 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-30 20:50:33,662 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:33,662 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-30 20:50:33,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:33,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:33,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:33,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:33,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:33,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:33,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:33,995 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:50:34,044 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:50:34,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:34,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:34,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:34,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-30 20:50:34,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:50:34,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:50:34,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:34,951 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-30 20:50:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:35,890 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 20:50:35,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:50:35,890 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-30 20:50:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:35,891 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:50:35,891 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:50:35,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:50:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:50:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 20:50:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:50:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 20:50:35,895 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-30 20:50:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:35,895 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 20:50:35,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:50:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 20:50:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 20:50:35,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:35,896 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-30 20:50:35,896 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:35,896 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:35,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-30 20:50:35,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:35,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:35,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:35,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:35,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:36,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:36,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:36,339 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:36,464 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 20:50:36,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:36,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:37,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:37,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-30 20:50:37,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 20:50:37,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 20:50:37,421 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:37,421 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-30 20:50:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:38,063 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 20:50:38,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:50:38,064 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-30 20:50:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:38,065 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:50:38,065 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 20:50:38,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:50:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 20:50:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 20:50:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:50:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 20:50:38,068 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-30 20:50:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:38,068 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 20:50:38,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 20:50:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 20:50:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:50:38,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:38,069 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-30 20:50:38,069 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:38,069 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:38,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-30 20:50:38,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:38,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:38,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:38,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:38,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:38,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:38,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:38,900 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:38,955 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 20:50:38,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:38,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:39,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:39,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-30 20:50:39,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 20:50:39,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 20:50:39,973 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:39,973 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-30 20:50:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:40,910 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 20:50:40,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:50:40,911 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-30 20:50:40,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:40,911 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:50:40,912 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:50:40,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:50:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:50:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 20:50:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 20:50:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 20:50:40,916 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-30 20:50:40,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:40,917 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 20:50:40,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 20:50:40,917 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 20:50:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 20:50:40,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:40,918 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-30 20:50:40,918 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:40,918 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-30 20:50:40,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:40,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:40,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:40,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:40,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:41,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:41,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:41,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:41,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:42,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:42,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-30 20:50:42,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 20:50:42,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 20:50:42,388 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:42,388 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-30 20:50:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:43,069 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 20:50:43,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:50:43,069 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-30 20:50:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:43,070 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:50:43,070 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 20:50:43,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:50:43,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 20:50:43,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 20:50:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 20:50:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 20:50:43,073 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-30 20:50:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:43,074 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 20:50:43,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 20:50:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 20:50:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 20:50:43,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:43,075 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-30 20:50:43,075 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:43,075 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:43,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-30 20:50:43,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:43,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:43,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:43,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:43,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:45,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:45,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:45,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:45,158 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:45,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:45,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:45,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:45,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-30 20:50:45,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 20:50:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 20:50:45,931 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:45,931 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-30 20:50:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:46,858 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 20:50:46,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:50:46,858 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-30 20:50:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:46,859 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:50:46,859 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 20:50:46,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time [2018-09-30 20:50:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 20:50:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 20:50:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 20:50:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 20:50:46,863 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-30 20:50:46,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:46,863 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 20:50:46,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 20:50:46,863 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 20:50:46,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 20:50:46,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:46,864 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-30 20:50:46,864 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:46,864 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:46,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-30 20:50:46,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:46,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:46,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:46,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:46,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:47,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:47,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:47,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:50:47,368 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 20:50:47,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:47,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:48,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:48,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-30 20:50:48,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 20:50:48,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 20:50:48,343 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:48,343 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-30 20:50:49,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:49,103 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 20:50:49,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:50:49,104 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-30 20:50:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:49,104 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:50:49,105 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 20:50:49,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:50:49,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 20:50:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 20:50:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 20:50:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 20:50:49,109 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-30 20:50:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:49,109 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 20:50:49,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 20:50:49,109 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 20:50:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 20:50:49,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:49,110 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-30 20:50:49,110 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:49,110 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:49,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-30 20:50:49,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:49,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:49,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:49,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:49,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:49,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:49,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:49,476 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:50:49,508 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:50:49,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:49,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:50,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:50,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-30 20:50:50,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 20:50:50,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 20:50:50,529 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:50,529 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-30 20:50:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:51,264 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 20:50:51,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:50:51,265 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-30 20:50:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:51,265 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:50:51,266 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 20:50:51,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:50:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 20:50:51,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 20:50:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 20:50:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 20:50:51,269 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-30 20:50:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:51,269 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 20:50:51,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 20:50:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 20:50:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 20:50:51,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:51,270 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-30 20:50:51,270 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:51,270 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-30 20:50:51,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:51,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:51,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:51,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:51,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:52,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:52,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:52,230 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:52,318 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 20:50:52,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:52,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:53,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:53,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-30 20:50:53,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 20:50:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 20:50:53,329 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:53,330 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-30 20:50:54,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:54,409 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 20:50:54,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:50:54,409 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-30 20:50:54,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:54,410 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:50:54,410 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 20:50:54,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:50:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 20:50:54,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 20:50:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 20:50:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 20:50:54,414 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-30 20:50:54,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:54,414 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 20:50:54,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 20:50:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 20:50:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 20:50:54,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:54,415 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-30 20:50:54,415 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:54,416 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:54,416 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-30 20:50:54,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:54,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:54,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:54,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:54,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:55,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:55,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:55,117 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:55,180 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 20:50:55,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:55,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:56,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:56,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-30 20:50:56,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 20:50:56,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 20:50:56,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:56,065 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-30 20:50:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:57,057 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 20:50:57,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:50:57,057 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-30 20:50:57,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:57,058 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:50:57,058 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 20:50:57,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:50:57,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 20:50:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 20:50:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 20:50:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 20:50:57,061 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-30 20:50:57,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:57,061 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 20:50:57,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 20:50:57,061 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 20:50:57,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 20:50:57,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:57,062 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-30 20:50:57,062 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:57,062 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:57,062 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-30 20:50:57,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:57,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:57,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:57,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:57,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:57,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:57,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:57,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:57,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:58,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:58,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-30 20:50:58,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 20:50:58,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 20:50:58,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:58,360 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-30 20:50:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:59,295 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 20:50:59,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:50:59,295 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-30 20:50:59,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:59,296 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:50:59,296 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 20:50:59,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:50:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 20:50:59,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 20:50:59,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 20:50:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 20:50:59,299 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-30 20:50:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:59,300 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 20:50:59,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 20:50:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 20:50:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 20:50:59,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:59,300 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-30 20:50:59,301 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:59,301 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-30 20:50:59,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:59,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:59,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:59,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:59,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:59,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:59,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:59,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:59,798 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:59,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:59,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:00,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:00,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-30 20:51:00,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 20:51:00,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 20:51:00,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:00,845 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-30 20:51:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:01,754 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 20:51:01,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:51:01,754 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-30 20:51:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:01,755 INFO L225 Difference]: With dead ends: 131 [2018-09-30 20:51:01,755 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 20:51:01,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:51:01,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 20:51:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 20:51:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 20:51:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 20:51:01,758 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-30 20:51:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:01,758 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 20:51:01,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 20:51:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 20:51:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 20:51:01,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:01,759 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-30 20:51:01,759 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:01,759 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:01,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-30 20:51:01,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:01,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:01,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:01,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:01,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:02,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:02,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:02,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:02,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 20:51:02,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:02,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:03,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:03,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-30 20:51:03,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 20:51:03,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 20:51:03,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:03,144 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-30 20:51:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:04,074 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 20:51:04,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:51:04,074 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-30 20:51:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:04,075 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:51:04,075 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 20:51:04,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:51:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 20:51:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 20:51:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 20:51:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 20:51:04,081 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-30 20:51:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:04,081 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 20:51:04,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 20:51:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 20:51:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 20:51:04,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:04,082 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-30 20:51:04,082 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:04,082 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:04,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-30 20:51:04,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:04,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:04,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:04,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:04,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:04,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:04,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:04,500 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:04,551 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:04,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:04,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:06,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:06,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-30 20:51:06,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 20:51:06,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 20:51:06,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:06,122 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-30 20:51:07,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:07,074 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 20:51:07,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:51:07,074 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-30 20:51:07,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:07,075 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:51:07,075 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 20:51:07,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:51:07,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 20:51:07,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 20:51:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 20:51:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 20:51:07,080 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-30 20:51:07,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:07,080 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 20:51:07,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 20:51:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 20:51:07,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 20:51:07,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:07,081 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-30 20:51:07,081 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:07,081 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-30 20:51:07,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:07,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:07,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:07,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:07,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:07,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:07,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:07,528 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:07,601 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 20:51:07,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:07,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:09,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:09,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-30 20:51:09,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 20:51:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 20:51:09,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:09,589 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-30 20:51:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:10,801 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 20:51:10,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:51:10,802 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-30 20:51:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:10,802 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:51:10,803 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 20:51:10,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-09-30 20:51:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 20:51:10,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 20:51:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:51:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 20:51:10,807 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-30 20:51:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:10,807 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 20:51:10,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 20:51:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 20:51:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 20:51:10,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:10,808 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-30 20:51:10,809 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:10,809 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-30 20:51:10,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:10,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:10,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:10,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:10,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:11,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:11,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:11,408 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:51:11,483 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 20:51:11,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:11,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:12,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:12,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-30 20:51:12,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 20:51:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 20:51:12,511 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:12,511 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-30 20:51:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:13,649 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 20:51:13,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:51:13,650 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-30 20:51:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:13,650 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:51:13,650 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:51:13,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:51:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:51:13,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 20:51:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 20:51:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 20:51:13,654 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-30 20:51:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:13,655 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 20:51:13,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 20:51:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 20:51:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 20:51:13,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:13,655 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-30 20:51:13,656 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:13,656 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-30 20:51:13,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:13,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:13,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:13,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:13,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:14,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:14,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:14,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:14,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:15,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:15,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-30 20:51:15,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 20:51:15,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 20:51:15,224 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:15,224 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-30 20:51:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:16,331 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 20:51:16,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:51:16,331 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-30 20:51:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:16,332 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:51:16,332 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 20:51:16,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:51:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 20:51:16,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 20:51:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 20:51:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 20:51:16,335 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-30 20:51:16,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:16,336 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 20:51:16,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 20:51:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 20:51:16,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 20:51:16,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:16,337 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-30 20:51:16,337 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:16,337 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-30 20:51:16,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:16,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:16,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:16,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:16,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:16,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:16,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:16,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:16,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:16,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:16,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:17,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:17,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-30 20:51:17,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 20:51:17,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 20:51:17,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:17,817 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-30 20:51:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:18,772 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 20:51:18,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:51:18,772 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-30 20:51:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:18,773 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:51:18,773 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 20:51:18,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:51:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 20:51:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 20:51:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 20:51:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 20:51:18,776 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-30 20:51:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:18,777 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 20:51:18,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 20:51:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 20:51:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 20:51:18,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:18,778 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-30 20:51:18,778 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:18,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:18,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-30 20:51:18,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:18,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:18,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:18,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:18,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:19,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:19,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:19,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:19,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 20:51:19,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:19,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:20,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:20,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-30 20:51:20,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 20:51:20,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 20:51:20,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:20,280 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-30 20:51:21,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:21,578 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 20:51:21,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:51:21,585 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-30 20:51:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:21,585 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:51:21,585 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 20:51:21,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:51:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 20:51:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 20:51:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 20:51:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 20:51:21,590 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-30 20:51:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:21,590 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 20:51:21,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 20:51:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 20:51:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 20:51:21,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:21,591 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-30 20:51:21,591 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:21,591 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:21,591 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-30 20:51:21,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:21,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:21,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:21,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:21,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:22,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:22,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:22,099 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:22,138 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:22,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:22,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:23,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:23,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-30 20:51:23,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 20:51:23,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 20:51:23,447 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:23,447 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-30 20:51:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:24,399 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 20:51:24,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:51:24,399 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-30 20:51:24,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:24,400 INFO L225 Difference]: With dead ends: 147 [2018-09-30 20:51:24,400 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:51:24,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:51:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:51:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 20:51:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 20:51:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 20:51:24,404 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-30 20:51:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:24,404 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 20:51:24,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 20:51:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 20:51:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 20:51:24,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:24,405 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-30 20:51:24,405 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:24,406 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:24,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-30 20:51:24,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:24,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:24,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:24,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:24,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:25,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:25,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:25,052 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:25,250 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 20:51:25,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:25,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:26,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:26,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-30 20:51:26,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 20:51:26,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 20:51:26,688 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:26,688 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-30 20:51:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:27,800 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 20:51:27,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:51:27,800 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-30 20:51:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:27,801 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:51:27,801 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 20:51:27,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:51:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 20:51:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 20:51:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 20:51:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 20:51:27,806 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-30 20:51:27,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:27,807 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 20:51:27,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 20:51:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 20:51:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 20:51:27,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:27,808 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-30 20:51:27,808 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:27,808 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:27,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-30 20:51:27,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:27,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:27,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:27,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:27,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:28,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:28,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:28,284 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:51:28,371 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 20:51:28,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:28,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:29,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:29,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-30 20:51:29,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 20:51:29,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 20:51:29,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:29,478 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-30 20:51:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:30,437 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 20:51:30,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:51:30,437 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-30 20:51:30,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:30,438 INFO L225 Difference]: With dead ends: 151 [2018-09-30 20:51:30,439 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 20:51:30,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:51:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 20:51:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 20:51:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 20:51:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 20:51:30,444 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-30 20:51:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:30,444 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 20:51:30,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 20:51:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 20:51:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 20:51:30,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:30,445 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-30 20:51:30,445 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:30,445 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:30,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-30 20:51:30,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:30,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:30,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:30,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:30,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:31,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:31,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:31,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:31,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:32,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:32,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-30 20:51:32,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 20:51:32,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 20:51:32,295 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:32,295 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-30 20:51:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:33,543 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 20:51:33,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:51:33,543 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-30 20:51:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:33,544 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:51:33,544 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 20:51:33,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:51:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 20:51:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 20:51:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 20:51:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 20:51:33,549 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-30 20:51:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:33,549 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 20:51:33,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 20:51:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 20:51:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 20:51:33,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:33,550 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-30 20:51:33,551 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:33,551 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:33,551 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-30 20:51:33,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:33,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:33,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:33,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:33,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:34,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:34,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:34,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:34,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:34,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:34,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:35,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:35,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-30 20:51:35,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 20:51:35,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 20:51:35,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:35,223 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-30 20:51:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:36,427 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 20:51:36,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:51:36,428 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-30 20:51:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:36,428 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:51:36,429 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 20:51:36,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:51:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 20:51:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 20:51:36,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 20:51:36,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 20:51:36,432 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-30 20:51:36,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:36,432 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 20:51:36,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 20:51:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 20:51:36,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 20:51:36,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:36,433 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-30 20:51:36,433 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:36,433 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-30 20:51:36,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:36,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:36,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:36,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:36,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:36,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:36,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:36,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:37,000 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 20:51:37,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:37,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:38,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:38,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-30 20:51:38,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 20:51:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 20:51:38,137 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:38,137 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-30 20:51:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:39,162 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 20:51:39,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:51:39,163 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-30 20:51:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:39,164 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:51:39,164 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 20:51:39,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:51:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 20:51:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 20:51:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 20:51:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 20:51:39,167 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-30 20:51:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:39,167 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 20:51:39,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 20:51:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 20:51:39,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 20:51:39,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:39,168 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-30 20:51:39,168 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:39,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-30 20:51:39,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:39,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:39,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:39,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:39,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:39,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:39,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:39,674 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:39,718 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:39,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:39,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:40,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:40,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-30 20:51:40,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 20:51:40,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 20:51:40,843 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:40,843 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-30 20:51:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:42,098 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 20:51:42,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:51:42,098 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-30 20:51:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:42,099 INFO L225 Difference]: With dead ends: 159 [2018-09-30 20:51:42,099 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 20:51:42,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:51:42,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 20:51:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 20:51:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 20:51:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 20:51:42,103 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-30 20:51:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:42,103 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 20:51:42,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 20:51:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 20:51:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 20:51:42,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:42,104 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-30 20:51:42,104 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:42,104 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:42,104 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-30 20:51:42,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:42,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:42,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:42,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:42,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:42,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:42,611 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 [2018-09-30 20:51:42,618 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:42,727 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 20:51:42,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:42,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:43,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:43,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-30 20:51:43,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 20:51:43,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 20:51:43,878 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:43,878 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-30 20:51:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:45,248 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 20:51:45,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:51:45,248 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-30 20:51:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:45,249 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:51:45,249 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 20:51:45,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:51:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 20:51:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 20:51:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 20:51:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 20:51:45,254 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-30 20:51:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:45,254 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 20:51:45,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 20:51:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 20:51:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 20:51:45,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:45,255 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-30 20:51:45,256 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:45,256 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:45,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-30 20:51:45,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:45,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:45,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:45,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:45,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:45,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:45,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:45,781 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:51:45,890 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 20:51:45,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:45,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:47,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:47,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-30 20:51:47,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 20:51:47,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 20:51:47,287 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:47,287 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-30 20:51:48,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:48,615 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 20:51:48,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:51:48,616 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-30 20:51:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:48,616 INFO L225 Difference]: With dead ends: 163 [2018-09-30 20:51:48,616 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 20:51:48,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:51:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 20:51:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 20:51:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 20:51:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 20:51:48,621 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-30 20:51:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:48,622 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 20:51:48,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 20:51:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 20:51:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 20:51:48,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:48,623 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-30 20:51:48,623 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:48,623 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:48,623 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-30 20:51:48,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:48,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:48,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:48,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:48,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:49,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:49,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:49,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:49,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:50,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:50,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-30 20:51:50,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 20:51:50,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 20:51:50,427 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:50,427 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-30 20:51:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:51,915 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 20:51:51,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:51:51,915 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-30 20:51:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:51,916 INFO L225 Difference]: With dead ends: 165 [2018-09-30 20:51:51,916 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 20:51:51,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:51:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 20:51:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 20:51:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 20:51:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 20:51:51,922 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-30 20:51:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:51,923 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 20:51:51,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 20:51:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 20:51:51,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 20:51:51,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:51,924 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-30 20:51:51,924 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:51,925 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:51,925 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-30 20:51:51,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:51,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:51,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:51,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:51:51,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:52,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:52,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:52,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:51:52,509 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:51:52,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:52,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:53,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:53,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 162 [2018-09-30 20:51:53,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 20:51:53,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 20:51:53,728 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:53,728 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 164 states. [2018-09-30 20:51:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:55,164 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 20:51:55,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:51:55,164 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 163 [2018-09-30 20:51:55,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:55,165 INFO L225 Difference]: With dead ends: 167 [2018-09-30 20:51:55,165 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 20:51:55,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:51:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 20:51:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 20:51:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 20:51:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-09-30 20:51:55,168 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2018-09-30 20:51:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:55,169 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-09-30 20:51:55,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 20:51:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-09-30 20:51:55,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-09-30 20:51:55,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:55,169 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1] [2018-09-30 20:51:55,170 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:55,170 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1262747198, now seen corresponding path program 81 times [2018-09-30 20:51:55,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:55,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:55,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:55,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:55,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:55,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:55,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:55,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:55,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 20:51:55,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:55,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:57,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:57,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 164 [2018-09-30 20:51:57,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 20:51:57,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 20:51:57,402 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:57,402 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 166 states. [2018-09-30 20:51:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:58,629 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 20:51:58,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 20:51:58,630 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 165 [2018-09-30 20:51:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:58,630 INFO L225 Difference]: With dead ends: 169 [2018-09-30 20:51:58,630 INFO L226 Difference]: Without dead ends: 168 [2018-09-30 20:51:58,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:51:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-09-30 20:51:58,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-09-30 20:51:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-09-30 20:51:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-09-30 20:51:58,636 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2018-09-30 20:51:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:58,636 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-09-30 20:51:58,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 20:51:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-09-30 20:51:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 20:51:58,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:58,637 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1] [2018-09-30 20:51:58,638 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:58,638 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:58,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1975688580, now seen corresponding path program 82 times [2018-09-30 20:51:58,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:58,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:58,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:58,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:58,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:59,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:59,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:59,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:59,227 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:59,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:59,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:00,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:00,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 166 [2018-09-30 20:52:00,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-30 20:52:00,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-30 20:52:00,498 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:00,499 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 168 states. [2018-09-30 20:52:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:01,839 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 20:52:01,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:52:01,840 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 167 [2018-09-30 20:52:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:01,840 INFO L225 Difference]: With dead ends: 171 [2018-09-30 20:52:01,841 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 20:52:01,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:52:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 20:52:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-09-30 20:52:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-30 20:52:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-09-30 20:52:01,844 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2018-09-30 20:52:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:01,845 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-09-30 20:52:01,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-30 20:52:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-09-30 20:52:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-09-30 20:52:01,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:01,845 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1] [2018-09-30 20:52:01,846 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:01,846 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:01,846 INFO L82 PathProgramCache]: Analyzing trace with hash 261181638, now seen corresponding path program 83 times [2018-09-30 20:52:01,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:01,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:01,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:01,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:01,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:02,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:02,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:02,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:02,506 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 20:52:02,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:02,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:03,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:03,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 168 [2018-09-30 20:52:03,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-09-30 20:52:03,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-09-30 20:52:03,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:03,882 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 170 states. [2018-09-30 20:52:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:05,070 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 20:52:05,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:52:05,070 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 169 [2018-09-30 20:52:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:05,071 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:52:05,071 INFO L226 Difference]: Without dead ends: 172 [2018-09-30 20:52:05,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:52:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-30 20:52:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-30 20:52:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-30 20:52:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-09-30 20:52:05,075 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2018-09-30 20:52:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:05,075 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-09-30 20:52:05,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-09-30 20:52:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-09-30 20:52:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-30 20:52:05,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:05,076 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1] [2018-09-30 20:52:05,076 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:05,076 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:05,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1887452040, now seen corresponding path program 84 times [2018-09-30 20:52:05,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:05,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:05,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:05,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:05,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:05,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:05,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:05,732 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:05,826 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 20:52:05,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:05,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:07,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:07,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 170 [2018-09-30 20:52:07,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-09-30 20:52:07,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-09-30 20:52:07,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:07,312 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 172 states. [2018-09-30 20:52:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:08,732 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 20:52:08,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:52:08,733 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 171 [2018-09-30 20:52:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:08,734 INFO L225 Difference]: With dead ends: 175 [2018-09-30 20:52:08,734 INFO L226 Difference]: Without dead ends: 174 [2018-09-30 20:52:08,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:52:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-30 20:52:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-09-30 20:52:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-09-30 20:52:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-09-30 20:52:08,738 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2018-09-30 20:52:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:08,739 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-09-30 20:52:08,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-09-30 20:52:08,739 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-09-30 20:52:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 20:52:08,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:08,740 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1] [2018-09-30 20:52:08,740 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:08,741 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1365212618, now seen corresponding path program 85 times [2018-09-30 20:52:08,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:08,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:08,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:08,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:08,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:09,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:09,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:09,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:09,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:10,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:10,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 172 [2018-09-30 20:52:10,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-09-30 20:52:10,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-09-30 20:52:10,642 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:10,642 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 174 states. [2018-09-30 20:52:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:12,086 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 20:52:12,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 20:52:12,086 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 173 [2018-09-30 20:52:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:12,087 INFO L225 Difference]: With dead ends: 177 [2018-09-30 20:52:12,087 INFO L226 Difference]: Without dead ends: 176 [2018-09-30 20:52:12,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:52:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-30 20:52:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-30 20:52:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-30 20:52:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-09-30 20:52:12,094 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2018-09-30 20:52:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:12,094 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-09-30 20:52:12,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-09-30 20:52:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-09-30 20:52:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-09-30 20:52:12,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:12,096 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1] [2018-09-30 20:52:12,096 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:12,096 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:12,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2004301708, now seen corresponding path program 86 times [2018-09-30 20:52:12,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:12,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:12,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:12,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:12,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:12,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:12,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:12,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:12,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:12,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:12,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:14,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:14,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 174 [2018-09-30 20:52:14,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-09-30 20:52:14,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-09-30 20:52:14,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:14,026 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 176 states. [2018-09-30 20:52:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:15,363 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 20:52:15,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:52:15,364 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 175 [2018-09-30 20:52:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:15,364 INFO L225 Difference]: With dead ends: 179 [2018-09-30 20:52:15,365 INFO L226 Difference]: Without dead ends: 178 [2018-09-30 20:52:15,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:52:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-30 20:52:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-09-30 20:52:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-09-30 20:52:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-09-30 20:52:15,370 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2018-09-30 20:52:15,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:15,370 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-09-30 20:52:15,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-09-30 20:52:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-09-30 20:52:15,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-09-30 20:52:15,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:15,371 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1] [2018-09-30 20:52:15,371 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:15,371 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:15,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1988593870, now seen corresponding path program 87 times [2018-09-30 20:52:15,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:15,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:15,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:15,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:15,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:16,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:16,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:16,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:16,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 20:52:16,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:16,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:17,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:17,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 176 [2018-09-30 20:52:17,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-09-30 20:52:17,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-09-30 20:52:17,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:17,721 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 178 states. [2018-09-30 20:52:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:19,053 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 20:52:19,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:52:19,053 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 177 [2018-09-30 20:52:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:19,054 INFO L225 Difference]: With dead ends: 181 [2018-09-30 20:52:19,054 INFO L226 Difference]: Without dead ends: 180 [2018-09-30 20:52:19,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:52:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-09-30 20:52:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-09-30 20:52:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-30 20:52:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-09-30 20:52:19,058 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2018-09-30 20:52:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:19,058 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-09-30 20:52:19,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-09-30 20:52:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-09-30 20:52:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-30 20:52:19,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:19,059 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1] [2018-09-30 20:52:19,059 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:19,059 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:19,059 INFO L82 PathProgramCache]: Analyzing trace with hash -221736560, now seen corresponding path program 88 times [2018-09-30 20:52:19,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:19,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:19,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:19,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:19,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:19,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:19,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:19,673 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:19,721 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:19,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:19,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:21,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:21,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 178 [2018-09-30 20:52:21,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-09-30 20:52:21,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-09-30 20:52:21,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:21,062 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 180 states. [2018-09-30 20:52:22,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:22,613 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-30 20:52:22,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:52:22,613 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 179 [2018-09-30 20:52:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:22,614 INFO L225 Difference]: With dead ends: 183 [2018-09-30 20:52:22,614 INFO L226 Difference]: Without dead ends: 182 [2018-09-30 20:52:22,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-09-30 20:52:22,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-30 20:52:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-09-30 20:52:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-09-30 20:52:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-09-30 20:52:22,618 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2018-09-30 20:52:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:22,618 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-09-30 20:52:22,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-09-30 20:52:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-09-30 20:52:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-09-30 20:52:22,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:22,619 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1] [2018-09-30 20:52:22,619 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:22,619 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:22,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1659531730, now seen corresponding path program 89 times [2018-09-30 20:52:22,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:22,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:22,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:22,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:22,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:23,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:23,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:23,202 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:23,321 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 20:52:23,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:23,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:24,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:24,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 180 [2018-09-30 20:52:24,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-09-30 20:52:24,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-09-30 20:52:24,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:24,760 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 182 states. [2018-09-30 20:52:26,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:26,040 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 20:52:26,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 20:52:26,041 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 181 [2018-09-30 20:52:26,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:26,042 INFO L225 Difference]: With dead ends: 185 [2018-09-30 20:52:26,042 INFO L226 Difference]: Without dead ends: 184 [2018-09-30 20:52:26,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:52:26,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-30 20:52:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-09-30 20:52:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-30 20:52:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2018-09-30 20:52:26,046 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2018-09-30 20:52:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:26,046 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2018-09-30 20:52:26,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-09-30 20:52:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2018-09-30 20:52:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-30 20:52:26,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:26,047 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1] [2018-09-30 20:52:26,047 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:26,047 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:26,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1377126804, now seen corresponding path program 90 times [2018-09-30 20:52:26,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:26,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:26,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:26,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:26,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:26,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:26,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:26,664 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:26,790 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 20:52:26,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:26,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:28,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:28,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 182 [2018-09-30 20:52:28,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-09-30 20:52:28,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-09-30 20:52:28,408 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:28,408 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 184 states. [2018-09-30 20:52:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:29,938 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-30 20:52:29,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:52:29,938 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 183 [2018-09-30 20:52:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:29,939 INFO L225 Difference]: With dead ends: 187 [2018-09-30 20:52:29,939 INFO L226 Difference]: Without dead ends: 186 [2018-09-30 20:52:29,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:52:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-30 20:52:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-09-30 20:52:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-09-30 20:52:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-09-30 20:52:29,945 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2018-09-30 20:52:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:29,945 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-09-30 20:52:29,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-09-30 20:52:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-09-30 20:52:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-09-30 20:52:29,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:29,946 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1] [2018-09-30 20:52:29,947 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:29,947 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash 568932566, now seen corresponding path program 91 times [2018-09-30 20:52:29,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:29,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:29,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:29,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:29,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:30,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:30,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:30,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:30,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:32,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:32,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 184 [2018-09-30 20:52:32,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-09-30 20:52:32,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-09-30 20:52:32,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:32,166 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 186 states. [2018-09-30 20:52:33,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:33,705 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 20:52:33,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:52:33,705 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 185 [2018-09-30 20:52:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:33,706 INFO L225 Difference]: With dead ends: 189 [2018-09-30 20:52:33,706 INFO L226 Difference]: Without dead ends: 188 [2018-09-30 20:52:33,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-09-30 20:52:33,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-09-30 20:52:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-09-30 20:52:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-09-30 20:52:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-09-30 20:52:33,712 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2018-09-30 20:52:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:33,712 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-09-30 20:52:33,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-09-30 20:52:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-09-30 20:52:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-30 20:52:33,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:33,713 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1] [2018-09-30 20:52:33,713 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:33,713 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:33,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1283350424, now seen corresponding path program 92 times [2018-09-30 20:52:33,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:33,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:33,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:33,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:33,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:34,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:34,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:34,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:34,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:34,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:34,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:35,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:35,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 186 [2018-09-30 20:52:35,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-09-30 20:52:35,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-09-30 20:52:35,896 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:35,896 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 188 states. [2018-09-30 20:52:37,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:37,172 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-30 20:52:37,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:52:37,172 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 187 [2018-09-30 20:52:37,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:37,173 INFO L225 Difference]: With dead ends: 191 [2018-09-30 20:52:37,173 INFO L226 Difference]: Without dead ends: 190 [2018-09-30 20:52:37,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:52:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-30 20:52:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-09-30 20:52:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-30 20:52:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2018-09-30 20:52:37,177 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2018-09-30 20:52:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:37,178 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2018-09-30 20:52:37,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-09-30 20:52:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2018-09-30 20:52:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-30 20:52:37,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:37,179 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1] [2018-09-30 20:52:37,179 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:37,179 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:37,180 INFO L82 PathProgramCache]: Analyzing trace with hash 644144602, now seen corresponding path program 93 times [2018-09-30 20:52:37,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:37,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:37,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:37,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:37,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:38,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:38,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:38,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:52:38,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 20:52:38,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:38,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:39,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:39,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 188 [2018-09-30 20:52:39,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-09-30 20:52:39,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-09-30 20:52:39,710 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:39,710 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand 190 states. [2018-09-30 20:52:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:41,029 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 20:52:41,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:52:41,030 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 189 [2018-09-30 20:52:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:41,030 INFO L225 Difference]: With dead ends: 193 [2018-09-30 20:52:41,030 INFO L226 Difference]: Without dead ends: 192 [2018-09-30 20:52:41,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:52:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-09-30 20:52:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-09-30 20:52:41,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-09-30 20:52:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-09-30 20:52:41,034 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2018-09-30 20:52:41,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:41,035 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-09-30 20:52:41,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-09-30 20:52:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-09-30 20:52:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-30 20:52:41,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:41,036 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1] [2018-09-30 20:52:41,036 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:41,036 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash 547672988, now seen corresponding path program 94 times [2018-09-30 20:52:41,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:41,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:41,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:41,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:41,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:41,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:41,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:41,668 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:52:41,723 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:52:41,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:41,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:43,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:43,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 190 [2018-09-30 20:52:43,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-09-30 20:52:43,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-09-30 20:52:43,408 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:43,408 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 192 states. [2018-09-30 20:52:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:44,772 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-30 20:52:44,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:52:44,773 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 191 [2018-09-30 20:52:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:44,774 INFO L225 Difference]: With dead ends: 195 [2018-09-30 20:52:44,774 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 20:52:44,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:52:44,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 20:52:44,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-09-30 20:52:44,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-30 20:52:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-09-30 20:52:44,778 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2018-09-30 20:52:44,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:44,778 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-09-30 20:52:44,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-09-30 20:52:44,778 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-09-30 20:52:44,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-30 20:52:44,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:44,779 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1] [2018-09-30 20:52:44,779 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:44,779 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:44,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1967234850, now seen corresponding path program 95 times [2018-09-30 20:52:44,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:44,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:44,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:44,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:44,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:45,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:45,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:45,432 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:52:45,579 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 20:52:45,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:45,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:47,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:47,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 192 [2018-09-30 20:52:47,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-09-30 20:52:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-09-30 20:52:47,217 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:47,217 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 194 states. [2018-09-30 20:52:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:48,827 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 20:52:48,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 20:52:48,827 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 193 [2018-09-30 20:52:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:48,828 INFO L225 Difference]: With dead ends: 197 [2018-09-30 20:52:48,828 INFO L226 Difference]: Without dead ends: 196 [2018-09-30 20:52:48,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:52:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-30 20:52:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-30 20:52:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-30 20:52:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2018-09-30 20:52:48,832 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2018-09-30 20:52:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:48,832 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2018-09-30 20:52:48,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-09-30 20:52:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2018-09-30 20:52:48,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-30 20:52:48,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:48,834 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1] [2018-09-30 20:52:48,834 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:48,834 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:48,834 INFO L82 PathProgramCache]: Analyzing trace with hash -727079520, now seen corresponding path program 96 times [2018-09-30 20:52:48,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:48,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:48,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:48,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:49,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:49,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:49,493 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:49,622 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 20:52:49,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:49,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:51,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:51,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 194 [2018-09-30 20:52:51,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-09-30 20:52:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-09-30 20:52:51,204 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:51,205 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 196 states. [2018-09-30 20:52:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:52,639 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-30 20:52:52,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 20:52:52,639 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 195 [2018-09-30 20:52:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:52,640 INFO L225 Difference]: With dead ends: 199 [2018-09-30 20:52:52,640 INFO L226 Difference]: Without dead ends: 198 [2018-09-30 20:52:52,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:52:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-09-30 20:52:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-09-30 20:52:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-09-30 20:52:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-09-30 20:52:52,645 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2018-09-30 20:52:52,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:52,646 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-09-30 20:52:52,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-09-30 20:52:52,646 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-09-30 20:52:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-30 20:52:52,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:52,647 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1] [2018-09-30 20:52:52,647 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:52,647 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:52,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1356251618, now seen corresponding path program 97 times [2018-09-30 20:52:52,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:52,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:52,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:52,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:52:52,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:53,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:53,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:53,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:53,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:55,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:55,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 196 [2018-09-30 20:52:55,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-09-30 20:52:55,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-09-30 20:52:55,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:55,068 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 198 states. [2018-09-30 20:52:56,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:52:56,326 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 20:52:56,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 20:52:56,327 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 197 [2018-09-30 20:52:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:52:56,328 INFO L225 Difference]: With dead ends: 201 [2018-09-30 20:52:56,328 INFO L226 Difference]: Without dead ends: 200 [2018-09-30 20:52:56,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:52:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-09-30 20:52:56,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2018-09-30 20:52:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-30 20:52:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-09-30 20:52:56,332 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 197 [2018-09-30 20:52:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:52:56,332 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-09-30 20:52:56,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-09-30 20:52:56,332 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-09-30 20:52:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-09-30 20:52:56,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:52:56,333 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1] [2018-09-30 20:52:56,333 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:52:56,333 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:52:56,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1982715300, now seen corresponding path program 98 times [2018-09-30 20:52:56,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:52:56,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:52:56,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:56,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:52:56,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:52:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:57,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:57,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:57,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:52:57,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:52:57,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:57,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:58,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:58,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 198 [2018-09-30 20:52:58,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-09-30 20:52:58,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-09-30 20:52:58,940 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:58,940 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 200 states. [2018-09-30 20:53:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:00,301 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-30 20:53:00,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 20:53:00,301 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 199 [2018-09-30 20:53:00,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:00,302 INFO L225 Difference]: With dead ends: 203 [2018-09-30 20:53:00,302 INFO L226 Difference]: Without dead ends: 202 [2018-09-30 20:53:00,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-09-30 20:53:00,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-09-30 20:53:00,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-09-30 20:53:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-30 20:53:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2018-09-30 20:53:00,307 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 199 [2018-09-30 20:53:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:00,307 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2018-09-30 20:53:00,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-09-30 20:53:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2018-09-30 20:53:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-09-30 20:53:00,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:00,308 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1] [2018-09-30 20:53:00,308 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:00,308 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:00,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1576075034, now seen corresponding path program 99 times [2018-09-30 20:53:00,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:00,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:00,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:00,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:00,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:00,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:00,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:00,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:01,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-30 20:53:01,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:01,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:02,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:02,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 200 [2018-09-30 20:53:02,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-09-30 20:53:02,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-09-30 20:53:02,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:02,734 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 202 states. [2018-09-30 20:53:04,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:04,366 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 20:53:04,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 20:53:04,367 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 201 [2018-09-30 20:53:04,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:04,368 INFO L225 Difference]: With dead ends: 205 [2018-09-30 20:53:04,368 INFO L226 Difference]: Without dead ends: 204 [2018-09-30 20:53:04,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:53:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-09-30 20:53:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-09-30 20:53:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-09-30 20:53:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2018-09-30 20:53:04,372 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 201 [2018-09-30 20:53:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:04,372 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2018-09-30 20:53:04,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-09-30 20:53:04,372 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2018-09-30 20:53:04,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-30 20:53:04,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:04,373 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1] [2018-09-30 20:53:04,373 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:04,373 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:04,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1515348904, now seen corresponding path program 100 times [2018-09-30 20:53:04,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:04,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:04,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:04,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:04,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:05,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:05,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:05,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:53:05,149 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:53:05,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:05,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:06,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:06,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 202 [2018-09-30 20:53:06,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-09-30 20:53:06,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-09-30 20:53:06,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:06,795 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 204 states. [2018-09-30 20:53:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:08,513 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-30 20:53:08,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 20:53:08,513 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 203 [2018-09-30 20:53:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:08,514 INFO L225 Difference]: With dead ends: 207 [2018-09-30 20:53:08,514 INFO L226 Difference]: Without dead ends: 206 [2018-09-30 20:53:08,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-09-30 20:53:08,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-09-30 20:53:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-09-30 20:53:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-09-30 20:53:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-09-30 20:53:08,520 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 203 [2018-09-30 20:53:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:08,521 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-09-30 20:53:08,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-09-30 20:53:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-09-30 20:53:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-09-30 20:53:08,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:08,522 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1] [2018-09-30 20:53:08,522 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:08,523 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:08,523 INFO L82 PathProgramCache]: Analyzing trace with hash 256384490, now seen corresponding path program 101 times [2018-09-30 20:53:08,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:08,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:08,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:08,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:08,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:09,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:09,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:53:09,235 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:53:09,518 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-30 20:53:09,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:09,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:11,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:11,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 204 [2018-09-30 20:53:11,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-09-30 20:53:11,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-09-30 20:53:11,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:11,255 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 206 states. [2018-09-30 20:53:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:12,990 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-30 20:53:12,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 20:53:12,991 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 205 [2018-09-30 20:53:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:12,992 INFO L225 Difference]: With dead ends: 209 [2018-09-30 20:53:12,992 INFO L226 Difference]: Without dead ends: 208 [2018-09-30 20:53:12,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-09-30 20:53:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-30 20:53:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-09-30 20:53:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-30 20:53:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-09-30 20:53:12,996 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 205 [2018-09-30 20:53:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:12,996 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-09-30 20:53:12,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-09-30 20:53:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-09-30 20:53:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-30 20:53:12,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:12,997 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1] [2018-09-30 20:53:12,998 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:12,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:12,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1572360108, now seen corresponding path program 102 times [2018-09-30 20:53:12,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:12,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:12,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:12,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:12,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:13,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:13,881 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 [2018-09-30 20:53:13,888 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:53:14,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-30 20:53:14,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:14,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:15,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:15,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 206 [2018-09-30 20:53:15,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 208 states [2018-09-30 20:53:15,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2018-09-30 20:53:15,639 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:15,639 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 208 states. [2018-09-30 20:53:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:17,647 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-30 20:53:17,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 20:53:17,648 INFO L78 Accepts]: Start accepts. Automaton has 208 states. Word has length 207 [2018-09-30 20:53:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:17,648 INFO L225 Difference]: With dead ends: 211 [2018-09-30 20:53:17,648 INFO L226 Difference]: Without dead ends: 210 [2018-09-30 20:53:17,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-09-30 20:53:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-09-30 20:53:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-09-30 20:53:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-30 20:53:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-09-30 20:53:17,654 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 207 [2018-09-30 20:53:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:17,654 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-09-30 20:53:17,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 208 states. [2018-09-30 20:53:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-09-30 20:53:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-09-30 20:53:17,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:17,656 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1] [2018-09-30 20:53:17,656 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:17,656 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:17,656 INFO L82 PathProgramCache]: Analyzing trace with hash -790423314, now seen corresponding path program 103 times [2018-09-30 20:53:17,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:17,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:17,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:17,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:17,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:18,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:18,500 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 [2018-09-30 20:53:18,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:18,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:20,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:20,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 208 [2018-09-30 20:53:20,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-09-30 20:53:20,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-09-30 20:53:20,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:20,350 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 210 states. [2018-09-30 20:53:21,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:21,810 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-30 20:53:21,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 20:53:21,811 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 209 [2018-09-30 20:53:21,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:21,811 INFO L225 Difference]: With dead ends: 213 [2018-09-30 20:53:21,811 INFO L226 Difference]: Without dead ends: 212 [2018-09-30 20:53:21,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-09-30 20:53:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-09-30 20:53:21,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-09-30 20:53:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-09-30 20:53:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-09-30 20:53:21,817 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2018-09-30 20:53:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:21,817 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-09-30 20:53:21,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-09-30 20:53:21,817 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-09-30 20:53:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-09-30 20:53:21,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:21,818 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1] [2018-09-30 20:53:21,819 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:21,819 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:21,819 INFO L82 PathProgramCache]: Analyzing trace with hash 612407728, now seen corresponding path program 104 times [2018-09-30 20:53:21,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:21,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:21,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:21,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:53:21,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:22,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:22,551 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 [2018-09-30 20:53:22,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:53:22,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:53:22,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:22,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:53:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:24,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:53:24,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 210 [2018-09-30 20:53:24,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 212 states [2018-09-30 20:53:24,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2018-09-30 20:53:24,584 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:53:24,584 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 212 states. [2018-09-30 20:53:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:53:26,185 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-30 20:53:26,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 20:53:26,186 INFO L78 Accepts]: Start accepts. Automaton has 212 states. Word has length 211 [2018-09-30 20:53:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:53:26,186 INFO L225 Difference]: With dead ends: 215 [2018-09-30 20:53:26,186 INFO L226 Difference]: Without dead ends: 214 [2018-09-30 20:53:26,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-09-30 20:53:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-30 20:53:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-09-30 20:53:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-30 20:53:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2018-09-30 20:53:26,192 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 211 [2018-09-30 20:53:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:53:26,192 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2018-09-30 20:53:26,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 212 states. [2018-09-30 20:53:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2018-09-30 20:53:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-30 20:53:26,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:53:26,193 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1] [2018-09-30 20:53:26,193 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:53:26,193 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:53:26,193 INFO L82 PathProgramCache]: Analyzing trace with hash 113308146, now seen corresponding path program 105 times [2018-09-30 20:53:26,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:53:26,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:53:26,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:26,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:53:26,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:53:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:53:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:53:26,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:53:26,939 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 [2018-09-30 20:53:26,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:53:27,104 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-30 20:53:27,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:53:27,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-30 20:53:28,395 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-30 20:53:28,596 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:53:28,596 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:53:28,601 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:53:28,602 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:53:28 BoogieIcfgContainer [2018-09-30 20:53:28,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:53:28,603 INFO L168 Benchmark]: Toolchain (without parser) took 242678.16 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -87.6 MB). Free memory was 1.5 GB in the beginning and 925.3 MB in the end (delta: 551.4 MB). Peak memory consumption was 463.8 MB. Max. memory is 7.1 GB. [2018-09-30 20:53:28,605 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:53:28,605 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:53:28,606 INFO L168 Benchmark]: Boogie Preprocessor took 25.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:53:28,606 INFO L168 Benchmark]: RCFGBuilder took 211.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:53:28,607 INFO L168 Benchmark]: TraceAbstraction took 242392.39 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -87.6 MB). Free memory was 1.5 GB in the beginning and 925.3 MB in the end (delta: 530.3 MB). Peak memory consumption was 442.7 MB. Max. memory is 7.1 GB. [2018-09-30 20:53:28,610 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 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 211.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242392.39 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -87.6 MB). Free memory was 1.5 GB in the beginning and 925.3 MB in the end (delta: 530.3 MB). Peak memory consumption was 442.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 16). Cancelled while BasicCegarLoop was analyzing trace of length 214 with TraceHistMax 106, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 242.3s OverallTime, 106 OverallIterations, 106 TraceHistogramMax, 89.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 212 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 21707 SolverSat, 314 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16693 GetRequests, 5564 SyntacticMatches, 0 SemanticMatches, 11129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 129.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=105, 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: 0.4s AutomataMinimizationTime, 105 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 6.6s SatisfiabilityAnalysisTime, 137.4s InterpolantComputationTime, 22467 NumberOfCodeBlocks, 22467 NumberOfCodeBlocksAsserted, 2930 NumberOfCheckSat, 22258 ConstructedInterpolants, 0 QuantifiedInterpolants, 18787412 SizeOfPredicates, 0 NumberOfNonLiveVariables, 22672 ConjunctsInSsa, 5772 ConjunctsInUnsatCore, 209 InterpolantComputations, 1 PerfectInterpolantSequences, 0/771680 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/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-53-28-620.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-53-28-620.csv Completed graceful shutdown