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/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:57:18,965 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:57:18,967 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:57:18,979 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:57:18,980 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:57:18,981 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:57:18,982 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:57:18,984 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:57:18,986 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:57:18,987 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:57:18,988 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:57:19,013 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 10:57:19,028 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:57:19,029 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:57:19,030 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:57:19,030 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:57:19,031 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:57:19,031 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:57:19,031 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:57:19,031 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:57:19,031 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:57:19,032 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:57:19,032 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:57:19,032 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:57:19,032 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:57:19,032 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:57:19,032 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:57:19,033 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:57:19,033 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:57:19,033 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:57:19,033 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:57:19,033 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:57:19,034 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:57:19,034 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:57:19,034 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:57:19,034 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:57:19,034 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:57:19,035 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:57:19,035 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:57:19,035 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:57:19,035 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:57:19,035 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:57:19,036 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 10:57:19,089 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:57:19,102 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:57:19,106 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:57:19,107 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:57:19,108 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:57:19,109 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-30 10:57:19,109 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl' [2018-09-30 10:57:19,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:57:19,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:57:19,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:57:19,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:57:19,166 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:57:19,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:57:19" (1/1) ... [2018-09-30 10:57:19,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:57:19" (1/1) ... [2018-09-30 10:57:19,206 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:57:19,207 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:57:19,207 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:57:19,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:57:19,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:57:19,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:57:19,210 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:57:19,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:57:19" (1/1) ... [2018-09-30 10:57:19,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:57:19" (1/1) ... [2018-09-30 10:57:19,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:57:19" (1/1) ... [2018-09-30 10:57:19,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:57:19" (1/1) ... [2018-09-30 10:57:19,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:57:19" (1/1) ... [2018-09-30 10:57:19,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:57:19" (1/1) ... [2018-09-30 10:57:19,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:57:19" (1/1) ... [2018-09-30 10:57:19,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:57:19,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:57:19,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:57:19,235 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:57:19,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:57:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:57:19,316 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 10:57:19,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 10:57:19,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 10:57:19,490 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:57:19,490 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:57:19 BoogieIcfgContainer [2018-09-30 10:57:19,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:57:19,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:57:19,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:57:19,495 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:57:19,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:57:19" (1/2) ... [2018-09-30 10:57:19,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff0c4d9 and model type DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:57:19, skipping insertion in model container [2018-09-30 10:57:19,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:57:19" (2/2) ... [2018-09-30 10:57:19,499 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl [2018-09-30 10:57:19,509 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:57:19,516 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:57:19,567 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:57:19,568 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:57:19,568 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:57:19,568 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:57:19,568 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:57:19,568 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:57:19,569 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:57:19,569 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:57:19,569 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:57:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-30 10:57:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-30 10:57:19,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:19,590 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-30 10:57:19,591 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:19,599 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:19,600 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-30 10:57:19,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:19,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:19,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:19,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:57:19,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:19,768 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:57:19,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 10:57:19,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:57:19,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:57:19,784 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:19,785 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-30 10:57:19,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:19,995 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:57:19,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:57:19,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-30 10:57:19,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:20,017 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:57:20,017 INFO L226 Difference]: Without dead ends: 4 [2018-09-30 10:57:20,028 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 10:57:20,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-30 10:57:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-30 10:57:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-30 10:57:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-30 10:57:20,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-30 10:57:20,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:20,069 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-30 10:57:20,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:57:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-30 10:57:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:57:20,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:20,070 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:57:20,070 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:20,071 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:20,071 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-30 10:57:20,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:20,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:20,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:20,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:57:20,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:20,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:20,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:20,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:57:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:20,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:20,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:20,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-30 10:57:20,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:57:20,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:57:20,396 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:20,396 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 6 states. [2018-09-30 10:57:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:20,599 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-30 10:57:20,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:57:20,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-09-30 10:57:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:20,600 INFO L225 Difference]: With dead ends: 6 [2018-09-30 10:57:20,601 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 10:57:20,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 10:57:20,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 10:57:20,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 10:57:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 10:57:20,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 10:57:20,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:20,605 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 10:57:20,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:57:20,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 10:57:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:57:20,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:20,606 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-30 10:57:20,606 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:20,607 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:20,607 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-30 10:57:20,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:20,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:20,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:20,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:57:20,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:20,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:20,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:20,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:57:20,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:57:20,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:20,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:21,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:21,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-30 10:57:21,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:57:21,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:57:21,090 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:21,090 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 8 states. [2018-09-30 10:57:21,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:21,448 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-30 10:57:21,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:57:21,449 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-09-30 10:57:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:21,450 INFO L225 Difference]: With dead ends: 7 [2018-09-30 10:57:21,450 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 10:57:21,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 10:57:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 10:57:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:57:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 10:57:21,456 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 10:57:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:21,457 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 10:57:21,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:57:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 10:57:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:57:21,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:21,458 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-30 10:57:21,458 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:21,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:21,459 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-30 10:57:21,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:21,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:21,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:21,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:21,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:21,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:21,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:21,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:57:21,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:57:21,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:21,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:21,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:21,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-30 10:57:21,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:57:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:57:21,701 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:21,701 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2018-09-30 10:57:22,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:22,260 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 10:57:22,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:57:22,261 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-09-30 10:57:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:22,262 INFO L225 Difference]: With dead ends: 8 [2018-09-30 10:57:22,262 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:57:22,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:57:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:57:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:57:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:57:22,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 10:57:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:22,267 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:57:22,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:57:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:57:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:57:22,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:22,268 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-30 10:57:22,269 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:22,269 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:22,269 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-30 10:57:22,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:22,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:22,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:22,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:22,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:22,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:22,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:22,403 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:57:22,432 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:57:22,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:22,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:22,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:22,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-30 10:57:22,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:57:22,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:57:22,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:22,562 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 12 states. [2018-09-30 10:57:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:22,933 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:57:22,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:57:22,933 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-09-30 10:57:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:22,934 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:57:22,934 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:57:22,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:57:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:57:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:57:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 10:57:22,938 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 10:57:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:22,938 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 10:57:22,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:57:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 10:57:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:57:22,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:22,939 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-30 10:57:22,939 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:22,939 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:22,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-30 10:57:22,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:22,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:22,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:22,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:22,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:23,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:23,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:23,077 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:57:23,086 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:57:23,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:23,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:23,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:23,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-30 10:57:23,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:57:23,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:57:23,403 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:23,403 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 14 states. [2018-09-30 10:57:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:23,773 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 10:57:23,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:57:23,774 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-09-30 10:57:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:23,775 INFO L225 Difference]: With dead ends: 10 [2018-09-30 10:57:23,775 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:57:23,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:57:23,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:57:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:57:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:57:23,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 10:57:23,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:23,781 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:57:23,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:57:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:57:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:57:23,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:23,782 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-30 10:57:23,782 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:23,782 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:23,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-30 10:57:23,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:23,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:23,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:23,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:23,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:23,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:23,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:23,940 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:57:23,949 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:57:23,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:23,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:24,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:24,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-30 10:57:24,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:57:24,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:57:24,139 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:24,139 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2018-09-30 10:57:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:24,549 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:57:24,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:57:24,550 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2018-09-30 10:57:24,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:24,551 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:57:24,551 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:57:24,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:57:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:57:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:57:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 10:57:24,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 10:57:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:24,556 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 10:57:24,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:57:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 10:57:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:57:24,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:24,557 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-30 10:57:24,557 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:24,557 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:24,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-30 10:57:24,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:24,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:24,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:24,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:24,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:24,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:24,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:24,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:57:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:24,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:24,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:24,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-30 10:57:24,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:57:24,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:57:24,977 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:24,978 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 18 states. [2018-09-30 10:57:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:25,539 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 10:57:25,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:57:25,539 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 9 [2018-09-30 10:57:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:25,540 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:57:25,541 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:57:25,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:25,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:57:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:57:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:57:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:57:25,546 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 10:57:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:25,546 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:57:25,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:57:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:57:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:57:25,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:25,547 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-30 10:57:25,547 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:25,547 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:25,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-30 10:57:25,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:25,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:25,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:25,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:57:25,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:25,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:25,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:25,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:57:25,822 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:57:25,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:25,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:26,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:26,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-30 10:57:26,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:57:26,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:57:26,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:26,255 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2018-09-30 10:57:26,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:26,865 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:57:26,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:57:26,867 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 10 [2018-09-30 10:57:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:26,868 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:57:26,868 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:57:26,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:57:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:57:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:57:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 10:57:26,872 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 10:57:26,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:26,872 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 10:57:26,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:57:26,872 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 10:57:26,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:57:26,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:26,873 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-30 10:57:26,873 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:26,873 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:26,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-30 10:57:26,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:26,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:26,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:26,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:26,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:27,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:27,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:27,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:57:27,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:57:27,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:27,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:27,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:27,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-30 10:57:27,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:57:27,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:57:27,386 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:27,386 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 22 states. [2018-09-30 10:57:28,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:28,186 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 10:57:28,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:57:28,186 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 11 [2018-09-30 10:57:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:28,187 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:57:28,187 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:57:28,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:57:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:57:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:57:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:57:28,192 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 10:57:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:28,192 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:57:28,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:57:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:57:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:57:28,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:28,193 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-30 10:57:28,193 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:28,193 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-30 10:57:28,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:28,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:28,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:28,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:28,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:28,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:28,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:28,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:57:28,574 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:57:28,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:28,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:29,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:29,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-30 10:57:29,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:57:29,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:57:29,134 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:29,134 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 24 states. [2018-09-30 10:57:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:29,819 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:57:29,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:57:29,819 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2018-09-30 10:57:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:29,821 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:57:29,822 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:57:29,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:57:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:57:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:57:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 10:57:29,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 10:57:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:29,828 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 10:57:29,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:57:29,828 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 10:57:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:57:29,829 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:29,829 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-30 10:57:29,829 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:29,829 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-30 10:57:29,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:29,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:29,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:29,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:29,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:30,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:30,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:30,061 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:57:30,072 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:57:30,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:30,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:30,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:30,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-30 10:57:30,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:57:30,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:57:30,766 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:30,766 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 26 states. [2018-09-30 10:57:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:32,180 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 10:57:32,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:57:32,180 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2018-09-30 10:57:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:32,181 INFO L225 Difference]: With dead ends: 16 [2018-09-30 10:57:32,181 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:57:32,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:57:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:57:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:57:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:57:32,184 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 10:57:32,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:32,185 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:57:32,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:57:32,185 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:57:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:57:32,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:32,186 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-30 10:57:32,186 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:32,186 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:32,186 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-30 10:57:32,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:32,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:32,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:32,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:32,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:32,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:32,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:32,699 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:57:32,725 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:57:32,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:32,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:33,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:33,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-30 10:57:33,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:57:33,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:57:33,172 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:33,172 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 28 states. [2018-09-30 10:57:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:34,443 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:57:34,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:57:34,444 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 14 [2018-09-30 10:57:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:34,445 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:57:34,445 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:57:34,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:34,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:57:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:57:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:57:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 10:57:34,450 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 10:57:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:34,450 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 10:57:34,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:57:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 10:57:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:57:34,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:34,451 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-30 10:57:34,451 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:34,451 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-30 10:57:34,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:34,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:34,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:34,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:34,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:34,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:34,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:34,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:57:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:34,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:35,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:35,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-30 10:57:35,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:57:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:57:35,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:35,180 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 30 states. [2018-09-30 10:57:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:36,804 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 10:57:36,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:57:36,804 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 15 [2018-09-30 10:57:36,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:36,805 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:57:36,805 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:57:36,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:57:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:57:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:57:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:57:36,810 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 10:57:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:36,810 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:57:36,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:57:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:57:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:57:36,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:36,811 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-30 10:57:36,811 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:36,812 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-30 10:57:36,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:36,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:36,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:36,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:57:36,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:37,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:37,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:37,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:57:37,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:57:37,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:37,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:38,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:38,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-30 10:57:38,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:57:38,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:57:38,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:38,630 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 32 states. [2018-09-30 10:57:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:39,966 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:57:39,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:57:39,967 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 16 [2018-09-30 10:57:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:39,968 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:57:39,968 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:57:39,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:57:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:57:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:57:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 10:57:39,973 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 10:57:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:39,974 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 10:57:39,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:57:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 10:57:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:57:39,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:39,975 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-30 10:57:39,975 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:39,975 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:39,975 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-30 10:57:39,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:39,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:39,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:39,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:39,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:40,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:40,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:40,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:57:40,807 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:57:40,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:40,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:41,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:41,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-30 10:57:41,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:57:41,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:57:41,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:41,942 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 34 states. [2018-09-30 10:57:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:43,844 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 10:57:43,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:57:43,844 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 17 [2018-09-30 10:57:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:43,845 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:57:43,845 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:57:43,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:57:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:57:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:57:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:57:43,849 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 10:57:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:43,849 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:57:43,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:57:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:57:43,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:57:43,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:43,850 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-30 10:57:43,850 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:43,850 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:43,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-30 10:57:43,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:43,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:43,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:43,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:43,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:44,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:44,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:44,213 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:57:44,223 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:57:44,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:44,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:45,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:45,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-30 10:57:45,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:57:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:57:45,097 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:45,097 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 36 states. [2018-09-30 10:57:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:46,716 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:57:46,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:57:46,716 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 18 [2018-09-30 10:57:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:46,717 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:57:46,717 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:57:46,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:57:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:57:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:57:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 10:57:46,722 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 10:57:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:46,723 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 10:57:46,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:57:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 10:57:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:57:46,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:46,724 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-30 10:57:46,724 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:46,724 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:46,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-30 10:57:46,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:46,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:46,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:46,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:46,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:48,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:48,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:48,238 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:57:48,252 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 10:57:48,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:48,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:49,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:49,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-30 10:57:49,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:57:49,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:57:49,070 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:49,070 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 38 states. [2018-09-30 10:57:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:51,246 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 10:57:51,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:57:51,246 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 19 [2018-09-30 10:57:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:51,247 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:57:51,247 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:57:51,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:57:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:57:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:57:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:57:51,253 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 10:57:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:51,253 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:57:51,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:57:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:57:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:57:51,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:51,254 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-30 10:57:51,254 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:51,254 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:51,255 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-30 10:57:51,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:51,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:51,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:51,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:51,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:51,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:51,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:51,849 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:57:51,865 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 10:57:51,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:51,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:52,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:52,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-30 10:57:52,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:57:52,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:57:52,598 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:52,598 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 40 states. [2018-09-30 10:57:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:54,823 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:57:54,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:57:54,824 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 20 [2018-09-30 10:57:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:54,825 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:57:54,825 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:57:54,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:57:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:57:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:57:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 10:57:54,830 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 10:57:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:54,830 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 10:57:54,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:57:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 10:57:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:57:54,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:54,831 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-30 10:57:54,831 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:54,831 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:54,832 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-30 10:57:54,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:54,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:54,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:54,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:57:54,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:55,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:55,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:55,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:57:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:55,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:57:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:56,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:57:56,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-30 10:57:56,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:57:56,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:57:56,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:57:56,149 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 42 states. [2018-09-30 10:57:58,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:57:58,281 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 10:57:58,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:57:58,281 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 21 [2018-09-30 10:57:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:57:58,282 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:57:58,282 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:57:58,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:57:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:57:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:57:58,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:57:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:57:58,287 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 10:57:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:57:58,288 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:57:58,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:57:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:57:58,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:57:58,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:57:58,289 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-30 10:57:58,289 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:57:58,289 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:57:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-30 10:57:58,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:57:58,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:57:58,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:58,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:57:58,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:57:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:57:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:57:58,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:57:58,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:57:58,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:57:58,927 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:57:58,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:57:58,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:00,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:00,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-30 10:58:00,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:58:00,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:58:00,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:00,109 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 44 states. [2018-09-30 10:58:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:02,848 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:58:02,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:58:02,848 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 22 [2018-09-30 10:58:02,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:02,849 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:58:02,849 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:58:02,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:02,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:58:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:58:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 10:58:02,854 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 10:58:02,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:02,854 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 10:58:02,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:58:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 10:58:02,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:58:02,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:02,855 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-30 10:58:02,855 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:02,855 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:02,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-30 10:58:02,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:02,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:02,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:02,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:02,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:04,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:04,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:04,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:04,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:58:04,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:04,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:05,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:05,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-30 10:58:05,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:58:05,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:58:05,517 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:05,517 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 46 states. [2018-09-30 10:58:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:08,490 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 10:58:08,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:58:08,493 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 23 [2018-09-30 10:58:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:08,494 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:58:08,494 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:58:08,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:08,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:58:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:58:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:58:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:58:08,498 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 10:58:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:08,498 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:58:08,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:58:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:58:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:58:08,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:08,500 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-30 10:58:08,500 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:08,500 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:08,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-30 10:58:08,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:08,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:08,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:08,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:08,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:09,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:09,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:09,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:09,366 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:09,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:09,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:10,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:10,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-30 10:58:10,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:58:10,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:58:10,339 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:10,339 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 48 states. [2018-09-30 10:58:13,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:13,841 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:58:13,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:58:13,841 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 24 [2018-09-30 10:58:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:13,842 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:58:13,842 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:58:13,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:13,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:58:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:58:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 10:58:13,847 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 10:58:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:13,847 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 10:58:13,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:58:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 10:58:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:58:13,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:13,848 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-30 10:58:13,849 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:13,849 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:13,849 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-30 10:58:13,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:13,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:13,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:13,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:13,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:14,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:14,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:14,609 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:14,628 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:58:14,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:14,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:15,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:15,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-30 10:58:15,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:58:15,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:58:15,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:15,700 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 50 states. [2018-09-30 10:58:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:18,933 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 10:58:18,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:58:18,934 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 25 [2018-09-30 10:58:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:18,934 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:58:18,934 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:58:18,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:58:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:58:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:58:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:58:18,939 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 10:58:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:18,940 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:58:18,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:58:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:58:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:58:18,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:18,941 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-30 10:58:18,941 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:18,941 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-30 10:58:18,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:18,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:18,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:18,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:18,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:19,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:19,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:19,702 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:19,719 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:58:19,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:19,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:20,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:20,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-30 10:58:20,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:58:20,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:58:20,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:20,903 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 52 states. [2018-09-30 10:58:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:25,470 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:58:25,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:58:25,470 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 26 [2018-09-30 10:58:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:25,471 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:58:25,471 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:58:25,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:58:25,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:58:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:58:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 10:58:25,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 10:58:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:25,478 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 10:58:25,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:58:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 10:58:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:58:25,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:25,479 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-30 10:58:25,479 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:25,479 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:25,479 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-30 10:58:25,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:25,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:25,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:25,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:25,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:26,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:26,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:26,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:26,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:27,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:27,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-30 10:58:27,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:58:27,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:58:27,547 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:27,547 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 54 states. [2018-09-30 10:58:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:32,552 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 10:58:32,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:58:32,553 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 27 [2018-09-30 10:58:32,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:32,554 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:58:32,554 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:58:32,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:58:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:58:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:58:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:58:32,560 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 10:58:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:32,560 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:58:32,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:58:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:58:32,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:58:32,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:32,561 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-30 10:58:32,561 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:32,562 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:32,562 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-30 10:58:32,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:32,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:32,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:32,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:32,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:33,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:33,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:33,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:33,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:33,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:33,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:34,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:34,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-30 10:58:34,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:58:34,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:58:34,764 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:34,764 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 56 states. [2018-09-30 10:58:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:40,435 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:58:40,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:58:40,435 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 28 [2018-09-30 10:58:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:40,436 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:58:40,436 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:58:40,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:40,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:58:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:58:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:58:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 10:58:40,441 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 10:58:40,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:40,441 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 10:58:40,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:58:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 10:58:40,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:58:40,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:40,442 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-30 10:58:40,442 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:40,443 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:40,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-30 10:58:40,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:40,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:40,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:40,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:40,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:41,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:41,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:41,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:41,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 10:58:41,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:41,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:43,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:43,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-30 10:58:43,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:58:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:58:43,045 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:43,046 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 58 states. [2018-09-30 10:58:47,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:47,433 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 10:58:47,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:58:47,433 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 29 [2018-09-30 10:58:47,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:47,434 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:58:47,434 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:58:47,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:58:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:58:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:58:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:58:47,440 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 10:58:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:47,440 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:58:47,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:58:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:58:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:58:47,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:47,441 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-30 10:58:47,441 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:47,441 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:47,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-30 10:58:47,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:47,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:47,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:47,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:47,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:48,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:48,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:48,275 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:48,295 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:48,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:48,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:49,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:49,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-30 10:58:49,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:58:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:58:49,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:49,974 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 60 states. [2018-09-30 10:58:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:54,569 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:58:54,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:58:54,570 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 30 [2018-09-30 10:58:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:54,570 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:58:54,570 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:58:54,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:58:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:58:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:58:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 10:58:54,577 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 10:58:54,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:54,577 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 10:58:54,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:58:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 10:58:54,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:58:54,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:54,578 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-30 10:58:54,578 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:54,578 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:54,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-30 10:58:54,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:54,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:54,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:54,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:54,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:56,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:56,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:56,050 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:56,071 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 10:58:56,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:56,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:58,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:58,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-30 10:58:58,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:58:58,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:58:58,165 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:58,165 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 62 states. [2018-09-30 10:59:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:04,528 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 10:59:04,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:59:04,528 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 31 [2018-09-30 10:59:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:04,529 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:59:04,529 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:59:04,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:04,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:59:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:59:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:59:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:59:04,535 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 10:59:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:04,535 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:59:04,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:59:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:59:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:59:04,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:04,536 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-30 10:59:04,536 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:04,536 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:04,536 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-30 10:59:04,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:04,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:04,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:04,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:04,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:05,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:05,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:05,437 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:05,463 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 10:59:05,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:05,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:07,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:07,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-30 10:59:07,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:59:07,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:59:07,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:07,249 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 64 states. [2018-09-30 10:59:12,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:12,199 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:59:12,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:59:12,200 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 32 [2018-09-30 10:59:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:12,200 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:59:12,201 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:59:12,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:59:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:59:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:59:12,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 10:59:12,205 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 10:59:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:12,205 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 10:59:12,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:59:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 10:59:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:59:12,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:12,206 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-30 10:59:12,206 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:12,206 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:12,206 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-30 10:59:12,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:12,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:12,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:12,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:12,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:13,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:13,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:13,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:13,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:15,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:15,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-30 10:59:15,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:59:15,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:59:15,329 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:15,330 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 66 states. [2018-09-30 10:59:22,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:22,513 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 10:59:22,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:59:22,514 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 33 [2018-09-30 10:59:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:22,514 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:59:22,515 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:59:22,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:22,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:59:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:59:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:59:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:59:22,520 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 10:59:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:22,520 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:59:22,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:59:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:59:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:59:22,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:22,521 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-30 10:59:22,521 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:22,521 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:22,521 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-30 10:59:22,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:22,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:22,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:22,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:22,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:23,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:23,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:23,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:23,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:23,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:23,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:25,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:25,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-30 10:59:25,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:59:25,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:59:25,453 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:25,453 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 68 states. [2018-09-30 10:59:31,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:31,251 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:59:31,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:59:31,251 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 34 [2018-09-30 10:59:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:31,252 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:59:31,252 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:59:31,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:59:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:59:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:59:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 10:59:31,257 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 10:59:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:31,258 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 10:59:31,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:59:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 10:59:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:59:31,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:31,258 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-30 10:59:31,259 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:31,259 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:31,259 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-30 10:59:31,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:31,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:31,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:31,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:31,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:32,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:32,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:32,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:32,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 10:59:32,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:32,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:34,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:34,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-30 10:59:34,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:59:34,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:59:34,361 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:34,362 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 70 states. [2018-09-30 10:59:43,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:43,422 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 10:59:43,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:59:43,423 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 35 [2018-09-30 10:59:43,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:43,423 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:59:43,424 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:59:43,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:43,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:59:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:59:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:59:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:59:43,428 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 10:59:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:43,429 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:59:43,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:59:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:59:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:59:43,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:43,429 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-30 10:59:43,430 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:43,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:43,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-30 10:59:43,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:43,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:43,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:43,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:43,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:45,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:45,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:45,221 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:45,244 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:45,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:45,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:47,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:47,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-30 10:59:47,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:59:47,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:59:47,776 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:47,776 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 72 states. [2018-09-30 10:59:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:55,840 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:59:55,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:59:55,840 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 36 [2018-09-30 10:59:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:55,841 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:59:55,841 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:59:55,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:59:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:59:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:59:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 10:59:55,844 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 10:59:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:55,845 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 10:59:55,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:59:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 10:59:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:59:55,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:55,846 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-30 10:59:55,846 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:55,846 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:55,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-30 10:59:55,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:55,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:55,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:55,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:55,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:57,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:57,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:57,338 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:57,364 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:59:57,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:57,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:59,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:59,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-30 10:59:59,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:59:59,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:59:59,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:59,700 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 74 states. [2018-09-30 11:00:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:07,506 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 11:00:07,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 11:00:07,506 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 37 [2018-09-30 11:00:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:07,507 INFO L225 Difference]: With dead ends: 40 [2018-09-30 11:00:07,507 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 11:00:07,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 11:00:07,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 11:00:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 11:00:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 11:00:07,512 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 11:00:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:07,512 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 11:00:07,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 11:00:07,513 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 11:00:07,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 11:00:07,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:07,513 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-30 11:00:07,514 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:07,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:07,514 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-30 11:00:07,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:07,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:07,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:07,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:07,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:08,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:08,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:00:08,820 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:08,849 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 11:00:08,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:08,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:11,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:11,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-30 11:00:11,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 11:00:11,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 11:00:11,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:11,235 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 76 states. [2018-09-30 11:00:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:18,904 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 11:00:18,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 11:00:18,905 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 38 [2018-09-30 11:00:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:18,905 INFO L225 Difference]: With dead ends: 41 [2018-09-30 11:00:18,906 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 11:00:18,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 11:00:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 11:00:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 11:00:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 11:00:18,909 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 11:00:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:18,910 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 11:00:18,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 11:00:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 11:00:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 11:00:18,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:18,911 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-30 11:00:18,911 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:18,911 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:18,911 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-30 11:00:18,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:18,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:18,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:18,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:18,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:20,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:20,111 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 11:00:20,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:20,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:22,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:22,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-30 11:00:22,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 11:00:22,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 11:00:22,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:22,886 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 78 states. [2018-09-30 11:00:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:30,439 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 11:00:30,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 11:00:30,440 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 39 [2018-09-30 11:00:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:30,441 INFO L225 Difference]: With dead ends: 42 [2018-09-30 11:00:30,441 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 11:00:30,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:30,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 11:00:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 11:00:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 11:00:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 11:00:30,444 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 11:00:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:30,444 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 11:00:30,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 11:00:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 11:00:30,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 11:00:30,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:30,445 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-30 11:00:30,445 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:30,445 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-30 11:00:30,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:30,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:30,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:30,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:30,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:32,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:32,887 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 11:00:32,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:32,918 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:32,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:32,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:35,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:35,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-30 11:00:35,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 11:00:35,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 11:00:35,631 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:35,631 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 80 states. [2018-09-30 11:00:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:43,936 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 11:00:43,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 11:00:43,937 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 40 [2018-09-30 11:00:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:43,938 INFO L225 Difference]: With dead ends: 43 [2018-09-30 11:00:43,938 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 11:00:43,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 11:00:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 11:00:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 11:00:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 11:00:43,941 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 11:00:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:43,942 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 11:00:43,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 11:00:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 11:00:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 11:00:43,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:43,942 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-30 11:00:43,942 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:43,943 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-30 11:00:43,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:43,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:43,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:43,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:43,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:46,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:46,644 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 11:00:46,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:46,685 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 11:00:46,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:46,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:49,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:49,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-30 11:00:49,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 11:00:49,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 11:00:49,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:49,702 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 82 states. [2018-09-30 11:00:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:59,180 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 11:00:59,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 11:00:59,180 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 41 [2018-09-30 11:00:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:59,181 INFO L225 Difference]: With dead ends: 44 [2018-09-30 11:00:59,181 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 11:00:59,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 11:00:59,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 11:00:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 11:00:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 11:00:59,185 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 11:00:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:59,186 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 11:00:59,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 11:00:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 11:00:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 11:00:59,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:59,186 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-30 11:00:59,186 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:59,186 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:59,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-30 11:00:59,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:59,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:59,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:59,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:59,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:00,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:00,564 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 11:01:00,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:00,597 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:00,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:00,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:03,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:03,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-30 11:01:03,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 11:01:03,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 11:01:03,691 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:03,691 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 84 states. [2018-09-30 11:01:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:15,398 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 11:01:15,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 11:01:15,399 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 42 [2018-09-30 11:01:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:15,399 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:01:15,400 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 11:01:15,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:15,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 11:01:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 11:01:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 11:01:15,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 11:01:15,404 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 11:01:15,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:15,404 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 11:01:15,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 11:01:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 11:01:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 11:01:15,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:15,405 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-30 11:01:15,405 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:15,405 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-30 11:01:15,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:15,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:15,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:15,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:15,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:16,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:16,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:01:16,949 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:16,984 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 11:01:16,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:16,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:20,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:20,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-30 11:01:20,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 11:01:20,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 11:01:20,287 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:20,287 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 86 states. Received shutdown request... [2018-09-30 11:01:27,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 11:01:27,583 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 11:01:27,589 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 11:01:27,589 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:01:27 BoogieIcfgContainer [2018-09-30 11:01:27,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 11:01:27,590 INFO L168 Benchmark]: Toolchain (without parser) took 248430.33 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -57.7 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 142.1 MB). Peak memory consumption was 84.4 MB. Max. memory is 7.1 GB. [2018-09-30 11:01:27,592 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 11:01:27,593 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.42 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 11:01:27,593 INFO L168 Benchmark]: Boogie Preprocessor took 23.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 11:01:27,594 INFO L168 Benchmark]: RCFGBuilder took 256.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 11:01:27,594 INFO L168 Benchmark]: TraceAbstraction took 248098.16 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -57.7 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 120.9 MB). Peak memory consumption was 63.3 MB. Max. memory is 7.1 GB. [2018-09-30 11:01:27,598 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.42 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.90 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 256.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248098.16 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -57.7 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 120.9 MB). Peak memory consumption was 63.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 18). Cancelled while BasicCegarLoop was constructing difference of abstraction (44states) and FLOYD_HOARE automaton (currently 33 states, 86 states before enhancement), while ReachableStatesComputation was computing reachable states (31 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 248.0s OverallTime, 42 OverallIterations, 41 TraceHistogramMax, 158.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 84 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 40481 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1805 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=41, 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: 0.1s AutomataMinimizationTime, 41 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 86.0s InterpolantComputationTime, 1888 NumberOfCodeBlocks, 1888 NumberOfCodeBlocksAsserted, 321 NumberOfCheckSat, 1805 ConstructedInterpolants, 0 QuantifiedInterpolants, 664119 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3731 ConjunctsInSsa, 3608 ConjunctsInUnsatCore, 83 InterpolantComputations, 1 PerfectInterpolantSequences, 0/24682 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/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_11-01-27-612.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired03-FPBPCannibalizationSuccess.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_11-01-27-612.csv Completed graceful shutdown