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/NeonAngel01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 09:20:35,875 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 09:20:35,878 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 09:20:35,897 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 09:20:35,897 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 09:20:35,899 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 09:20:35,901 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 09:20:35,904 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 09:20:35,907 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 09:20:35,917 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 09:20:35,919 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 09:20:35,919 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 09:20:35,920 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 09:20:35,921 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 09:20:35,925 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 09:20:35,926 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 09:20:35,927 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 09:20:35,930 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 09:20:35,934 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 09:20:35,938 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 09:20:35,941 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 09:20:35,943 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 09:20:35,949 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-03 09:20:35,965 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 [2018-10-03 09:20:35,992 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 09:20:35,993 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 09:20:35,997 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 09:20:35,997 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 09:20:35,998 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 09:20:35,998 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 09:20:35,998 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 09:20:35,999 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 09:20:36,000 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 09:20:36,000 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 09:20:36,000 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 09:20:36,000 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 09:20:36,001 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 09:20:36,001 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 09:20:36,001 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 09:20:36,002 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 09:20:36,002 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 09:20:36,002 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 09:20:36,002 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 09:20:36,002 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 09:20:36,003 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 09:20:36,003 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 09:20:36,003 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:20:36,005 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 09:20:36,005 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 09:20:36,005 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 09:20:36,005 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 09:20:36,006 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 09:20:36,006 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 09:20:36,006 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 09:20:36,006 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-03 09:20:36,077 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 09:20:36,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 09:20:36,099 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 09:20:36,101 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 09:20:36,101 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 09:20:36,102 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl [2018-10-03 09:20:36,103 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl' [2018-10-03 09:20:36,155 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 09:20:36,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 09:20:36,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 09:20:36,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 09:20:36,162 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 09:20:36,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:20:36" (1/1) ... [2018-10-03 09:20:36,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:20:36" (1/1) ... [2018-10-03 09:20:36,201 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 09:20:36,201 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 09:20:36,201 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 09:20:36,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 09:20:36,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 09:20:36,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 09:20:36,205 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 09:20:36,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:20:36" (1/1) ... [2018-10-03 09:20:36,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:20:36" (1/1) ... [2018-10-03 09:20:36,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:20:36" (1/1) ... [2018-10-03 09:20:36,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:20:36" (1/1) ... [2018-10-03 09:20:36,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:20:36" (1/1) ... [2018-10-03 09:20:36,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:20:36" (1/1) ... [2018-10-03 09:20:36,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:20:36" (1/1) ... [2018-10-03 09:20:36,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 09:20:36,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 09:20:36,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 09:20:36,231 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 09:20:36,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:20:36" (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 [2018-10-03 09:20:36,303 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-03 09:20:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-03 09:20:36,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-03 09:20:36,465 INFO L337 CfgBuilder]: Using library mode [2018-10-03 09:20:36,465 INFO L202 PluginConnector]: Adding new model NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:20:36 BoogieIcfgContainer [2018-10-03 09:20:36,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 09:20:36,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 09:20:36,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 09:20:36,470 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 09:20:36,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:20:36" (1/2) ... [2018-10-03 09:20:36,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d37753 and model type NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 09:20:36, skipping insertion in model container [2018-10-03 09:20:36,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:20:36" (2/2) ... [2018-10-03 09:20:36,474 INFO L112 eAbstractionObserver]: Analyzing ICFG NeonAngel01.bpl [2018-10-03 09:20:36,484 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 09:20:36,491 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 09:20:36,544 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 09:20:36,545 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 09:20:36,545 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 09:20:36,545 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 09:20:36,545 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 09:20:36,545 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 09:20:36,546 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 09:20:36,546 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 09:20:36,546 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 09:20:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-03 09:20:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-03 09:20:36,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:36,569 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-03 09:20:36,571 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:36,577 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-10-03 09:20:36,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:36,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:36,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:36,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:36,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:36,746 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:20:36,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 09:20:36,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 09:20:36,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 09:20:36,763 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:36,764 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-03 09:20:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:36,806 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-03 09:20:36,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 09:20:36,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-03 09:20:36,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:36,828 INFO L225 Difference]: With dead ends: 13 [2018-10-03 09:20:36,828 INFO L226 Difference]: Without dead ends: 5 [2018-10-03 09:20:36,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-03 09:20:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-03 09:20:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-03 09:20:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-03 09:20:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-03 09:20:36,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-03 09:20:36,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:36,867 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-03 09:20:36,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 09:20:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-03 09:20:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 09:20:36,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:36,868 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 09:20:36,868 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:36,869 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:36,869 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-10-03 09:20:36,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:36,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:36,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:36,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:36,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:37,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:37,048 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 [2018-10-03 09:20:37,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:37,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:37,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:37,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 09:20:37,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 09:20:37,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 09:20:37,200 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:37,200 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-03 09:20:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:37,294 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-03 09:20:37,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 09:20:37,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-03 09:20:37,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:37,298 INFO L225 Difference]: With dead ends: 8 [2018-10-03 09:20:37,298 INFO L226 Difference]: Without dead ends: 6 [2018-10-03 09:20:37,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 2 [2018-10-03 09:20:37,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-03 09:20:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-03 09:20:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 09:20:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-03 09:20:37,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-03 09:20:37,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:37,303 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-03 09:20:37,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 09:20:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-03 09:20:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 09:20:37,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:37,304 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-03 09:20:37,304 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:37,305 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:37,305 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-10-03 09:20:37,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:37,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:37,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:37,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:37,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:37,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:37,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:20:37,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:20:37,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:20:37,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:37,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:37,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:37,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 09:20:37,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 09:20:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 09:20:37,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:37,576 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-03 09:20:37,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:37,603 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 09:20:37,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 09:20:37,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-03 09:20:37,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:37,605 INFO L225 Difference]: With dead ends: 9 [2018-10-03 09:20:37,605 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 09:20:37,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-03 09:20:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 09:20:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 09:20:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 09:20:37,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 09:20:37,609 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-03 09:20:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:37,609 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 09:20:37,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 09:20:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 09:20:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 09:20:37,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:37,610 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-03 09:20:37,611 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:37,611 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:37,611 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-10-03 09:20:37,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:37,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:37,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:37,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:37,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:37,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:37,770 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 [2018-10-03 09:20:37,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:20:37,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 09:20:37,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:37,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:37,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:37,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 09:20:37,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 09:20:37,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 09:20:37,895 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:37,895 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-03 09:20:37,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:37,916 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 09:20:37,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 09:20:37,917 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-03 09:20:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:37,917 INFO L225 Difference]: With dead ends: 10 [2018-10-03 09:20:37,918 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 09:20:37,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-03 09:20:37,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 09:20:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 09:20:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 09:20:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-03 09:20:37,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-03 09:20:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:37,922 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-03 09:20:37,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 09:20:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-03 09:20:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 09:20:37,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:37,923 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-03 09:20:37,923 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:37,923 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-10-03 09:20:37,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:37,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:37,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:37,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:37,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:38,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:38,234 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 [2018-10-03 09:20:38,242 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:20:38,256 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:20:38,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:38,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:38,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:38,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 09:20:38,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 09:20:38,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 09:20:38,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:38,314 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-03 09:20:38,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:38,367 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 09:20:38,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 09:20:38,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-03 09:20:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:38,369 INFO L225 Difference]: With dead ends: 11 [2018-10-03 09:20:38,369 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 09:20:38,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 5 [2018-10-03 09:20:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 09:20:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 09:20:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 09:20:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 09:20:38,372 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-03 09:20:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:38,372 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 09:20:38,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 09:20:38,373 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 09:20:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 09:20:38,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:38,373 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-03 09:20:38,374 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:38,374 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-10-03 09:20:38,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:38,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:38,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:38,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:38,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:38,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:38,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:20:38,505 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:20:38,524 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 09:20:38,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:38,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:38,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:38,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 09:20:38,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 09:20:38,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 09:20:38,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:38,698 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-03 09:20:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:38,729 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-03 09:20:38,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 09:20:38,729 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-03 09:20:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:38,730 INFO L225 Difference]: With dead ends: 12 [2018-10-03 09:20:38,730 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 09:20:38,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 6 [2018-10-03 09:20:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 09:20:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 09:20:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 09:20:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-03 09:20:38,734 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-03 09:20:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:38,734 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-03 09:20:38,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 09:20:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-03 09:20:38,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 09:20:38,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:38,735 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-03 09:20:38,736 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:38,736 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:38,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-10-03 09:20:38,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:38,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:38,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:38,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:38,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:38,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:38,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:20:38,876 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:20:38,886 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 09:20:38,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:38,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:38,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:38,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 09:20:38,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 09:20:38,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 09:20:38,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:38,958 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-03 09:20:38,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:38,992 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 09:20:38,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 09:20:38,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-03 09:20:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:38,993 INFO L225 Difference]: With dead ends: 13 [2018-10-03 09:20:38,994 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 09:20:38,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-03 09:20:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 09:20:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 09:20:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 09:20:38,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 09:20:38,998 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-03 09:20:38,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:38,998 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 09:20:38,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 09:20:38,998 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 09:20:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 09:20:38,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:38,999 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-03 09:20:38,999 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:38,999 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:39,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-10-03 09:20:39,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:39,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:39,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:39,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:39,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:39,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:39,520 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 [2018-10-03 09:20:39,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:39,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:39,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:39,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 09:20:39,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 09:20:39,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 09:20:39,599 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:39,599 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-03 09:20:39,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:39,663 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-03 09:20:39,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 09:20:39,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-03 09:20:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:39,665 INFO L225 Difference]: With dead ends: 14 [2018-10-03 09:20:39,665 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 09:20:39,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 8 [2018-10-03 09:20:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 09:20:39,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 09:20:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 09:20:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-03 09:20:39,668 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-03 09:20:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:39,668 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-03 09:20:39,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 09:20:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-03 09:20:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 09:20:39,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:39,669 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-03 09:20:39,669 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:39,669 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:39,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-10-03 09:20:39,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:39,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:39,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:39,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:39,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:39,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:39,921 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 [2018-10-03 09:20:39,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:20:39,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:20:39,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:39,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:40,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:40,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 09:20:40,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 09:20:40,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 09:20:40,030 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:40,030 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-03 09:20:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:40,090 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 09:20:40,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 09:20:40,092 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-03 09:20:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:40,092 INFO L225 Difference]: With dead ends: 15 [2018-10-03 09:20:40,092 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 09:20:40,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 9 [2018-10-03 09:20:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 09:20:40,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 09:20:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 09:20:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 09:20:40,095 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-03 09:20:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:40,096 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 09:20:40,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 09:20:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 09:20:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 09:20:40,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:40,096 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-03 09:20:40,097 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:40,097 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-10-03 09:20:40,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:40,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:40,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:40,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:40,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:40,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:40,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:20:40,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:20:40,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 09:20:40,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:40,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:40,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:40,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 09:20:40,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 09:20:40,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 09:20:40,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:40,634 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-03 09:20:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:40,664 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-03 09:20:40,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 09:20:40,665 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-03 09:20:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:40,666 INFO L225 Difference]: With dead ends: 16 [2018-10-03 09:20:40,666 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 09:20:40,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 10 [2018-10-03 09:20:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 09:20:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 09:20:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 09:20:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-03 09:20:40,670 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-03 09:20:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:40,671 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-03 09:20:40,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 09:20:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-03 09:20:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 09:20:40,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:40,672 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-03 09:20:40,672 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:40,672 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:40,672 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-10-03 09:20:40,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:40,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:40,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:40,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:40,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:40,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:40,936 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 [2018-10-03 09:20:40,944 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:20:40,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:20:40,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:40,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:41,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:41,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 09:20:41,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 09:20:41,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 09:20:41,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:41,037 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-03 09:20:41,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:41,110 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 09:20:41,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 09:20:41,111 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-03 09:20:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:41,111 INFO L225 Difference]: With dead ends: 17 [2018-10-03 09:20:41,112 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 09:20:41,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-03 09:20:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 09:20:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 09:20:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 09:20:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 09:20:41,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-03 09:20:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:41,117 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 09:20:41,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 09:20:41,117 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 09:20:41,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 09:20:41,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:41,118 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-03 09:20:41,118 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:41,118 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:41,119 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-10-03 09:20:41,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:41,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:41,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:41,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:41,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:41,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:41,325 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 [2018-10-03 09:20:41,333 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:20:43,786 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 09:20:43,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:43,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:43,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:43,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 09:20:43,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 09:20:43,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 09:20:43,859 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:43,859 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-03 09:20:43,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:43,899 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-03 09:20:43,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 09:20:43,899 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-03 09:20:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:43,900 INFO L225 Difference]: With dead ends: 18 [2018-10-03 09:20:43,901 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 09:20:43,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 12 [2018-10-03 09:20:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 09:20:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 09:20:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 09:20:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-03 09:20:43,905 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-03 09:20:43,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:43,905 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-03 09:20:43,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 09:20:43,905 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-03 09:20:43,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 09:20:43,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:43,906 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-03 09:20:43,906 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:43,906 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:43,906 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-10-03 09:20:43,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:43,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:43,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:43,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:43,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:44,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:44,182 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 [2018-10-03 09:20:44,190 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:20:44,225 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 09:20:44,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:44,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:44,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:44,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 09:20:44,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 09:20:44,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 09:20:44,296 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:44,296 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-03 09:20:44,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:44,337 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 09:20:44,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 09:20:44,337 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-03 09:20:44,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:44,338 INFO L225 Difference]: With dead ends: 19 [2018-10-03 09:20:44,338 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 09:20:44,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 13 [2018-10-03 09:20:44,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 09:20:44,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 09:20:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 09:20:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 09:20:44,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-03 09:20:44,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:44,342 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 09:20:44,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 09:20:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 09:20:44,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 09:20:44,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:44,344 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-03 09:20:44,344 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:44,344 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:44,344 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-10-03 09:20:44,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:44,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:44,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:44,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:44,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:44,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:44,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:20:44,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:44,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:44,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:44,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 09:20:44,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 09:20:44,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 09:20:44,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:44,649 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-03 09:20:44,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:44,820 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-03 09:20:44,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 09:20:44,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-03 09:20:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:44,823 INFO L225 Difference]: With dead ends: 20 [2018-10-03 09:20:44,823 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 09:20:44,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 14 [2018-10-03 09:20:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 09:20:44,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-03 09:20:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 09:20:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-03 09:20:44,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-03 09:20:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:44,827 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-03 09:20:44,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 09:20:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-03 09:20:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 09:20:44,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:44,827 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-03 09:20:44,828 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:44,828 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:44,828 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-10-03 09:20:44,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:44,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:44,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:44,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:44,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:45,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:45,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:20:45,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:20:45,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:20:45,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:45,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:45,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:45,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 09:20:45,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:20:45,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:20:45,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:45,237 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-03 09:20:45,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:45,275 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 09:20:45,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 09:20:45,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-03 09:20:45,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:45,276 INFO L225 Difference]: With dead ends: 21 [2018-10-03 09:20:45,276 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 09:20:45,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 15 [2018-10-03 09:20:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 09:20:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 09:20:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 09:20:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 09:20:45,281 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-03 09:20:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:45,281 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 09:20:45,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:20:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 09:20:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 09:20:45,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:45,282 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-03 09:20:45,282 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:45,283 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:45,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-10-03 09:20:45,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:45,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:45,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:45,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:45,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:45,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:45,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:20:45,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:20:47,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 09:20:47,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:47,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:48,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:48,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 09:20:48,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 09:20:48,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 09:20:48,131 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:48,132 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-03 09:20:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:48,175 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-03 09:20:48,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 09:20:48,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-03 09:20:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:48,177 INFO L225 Difference]: With dead ends: 22 [2018-10-03 09:20:48,177 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 09:20:48,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 16 [2018-10-03 09:20:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 09:20:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 09:20:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 09:20:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-03 09:20:48,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-03 09:20:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:48,182 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-03 09:20:48,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 09:20:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-03 09:20:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 09:20:48,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:48,183 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-03 09:20:48,183 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:48,183 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:48,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-10-03 09:20:48,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:48,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:48,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:48,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:48,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:48,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:48,793 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 [2018-10-03 09:20:48,802 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:20:48,826 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:20:48,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:48,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:48,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:48,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 09:20:48,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 09:20:48,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 09:20:48,983 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:48,983 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-03 09:20:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:49,081 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 09:20:49,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 09:20:49,082 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-03 09:20:49,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:49,083 INFO L225 Difference]: With dead ends: 23 [2018-10-03 09:20:49,083 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 09:20:49,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 17 [2018-10-03 09:20:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 09:20:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 09:20:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 09:20:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 09:20:49,087 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-03 09:20:49,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:49,087 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 09:20:49,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 09:20:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 09:20:49,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 09:20:49,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:49,088 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-03 09:20:49,088 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:49,089 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:49,089 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-10-03 09:20:49,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:49,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:49,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:49,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:49,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:49,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:49,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:20:49,562 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:21:42,206 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 09:21:42,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:43,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:43,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:43,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 09:21:43,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 09:21:43,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 09:21:43,382 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:43,382 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-03 09:21:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:43,415 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-03 09:21:43,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 09:21:43,415 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-03 09:21:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:43,417 INFO L225 Difference]: With dead ends: 24 [2018-10-03 09:21:43,417 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 09:21:43,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 18 [2018-10-03 09:21:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 09:21:43,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 09:21:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 09:21:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-03 09:21:43,422 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-03 09:21:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:43,422 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-03 09:21:43,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 09:21:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-03 09:21:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-03 09:21:43,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:43,423 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-03 09:21:43,423 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:43,423 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:43,423 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-10-03 09:21:43,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:43,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:43,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:43,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:43,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:43,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:43,612 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 [2018-10-03 09:21:43,622 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:21:45,517 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 09:21:45,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:45,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:45,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:45,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 09:21:45,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 09:21:45,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 09:21:45,615 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:45,615 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-03 09:21:45,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:45,652 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 09:21:45,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 09:21:45,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-03 09:21:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:45,653 INFO L225 Difference]: With dead ends: 25 [2018-10-03 09:21:45,653 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 09:21:45,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 19 [2018-10-03 09:21:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 09:21:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 09:21:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 09:21:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 09:21:45,658 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-03 09:21:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:45,658 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 09:21:45,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 09:21:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 09:21:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 09:21:45,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:45,659 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-03 09:21:45,659 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:45,659 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:45,659 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-10-03 09:21:45,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:45,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:45,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:45,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:45,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:45,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:45,924 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 [2018-10-03 09:21:45,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:45,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:46,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:46,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 09:21:46,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 09:21:46,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 09:21:46,126 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:46,126 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-03 09:21:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:46,220 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-03 09:21:46,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 09:21:46,220 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-03 09:21:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:46,221 INFO L225 Difference]: With dead ends: 26 [2018-10-03 09:21:46,221 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 09:21:46,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 20 [2018-10-03 09:21:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 09:21:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-03 09:21:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 09:21:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-03 09:21:46,225 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-03 09:21:46,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:46,226 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-03 09:21:46,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 09:21:46,226 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-03 09:21:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 09:21:46,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:46,227 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-03 09:21:46,227 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:46,227 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-10-03 09:21:46,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:46,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:46,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:46,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:21:46,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:46,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:46,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:21:46,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:21:46,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:21:46,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:21:46,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:21:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:46,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:21:46,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 09:21:46,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 09:21:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 09:21:46,781 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:21:46,781 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-03 09:21:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:21:46,852 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 09:21:46,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 09:21:46,856 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-03 09:21:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:21:46,857 INFO L225 Difference]: With dead ends: 27 [2018-10-03 09:21:46,857 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 09:21:46,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 21 [2018-10-03 09:21:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 09:21:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 09:21:46,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 09:21:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 09:21:46,860 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-03 09:21:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:21:46,860 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 09:21:46,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 09:21:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 09:21:46,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 09:21:46,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:21:46,862 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-03 09:21:46,862 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:21:46,862 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:21:46,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-10-03 09:21:46,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:21:46,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:21:46,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:46,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:21:46,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:21:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:21:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:21:47,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:21:47,247 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 [2018-10-03 09:21:47,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:22:19,239 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 09:22:19,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:19,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:22:19,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:22:19,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 09:22:19,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 09:22:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 09:22:19,502 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:19,502 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-03 09:22:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:19,765 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-03 09:22:19,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 09:22:19,767 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-03 09:22:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:19,768 INFO L225 Difference]: With dead ends: 28 [2018-10-03 09:22:19,768 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 09:22:19,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 22 [2018-10-03 09:22:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 09:22:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 09:22:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 09:22:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-03 09:22:19,771 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-03 09:22:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:19,771 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-03 09:22:19,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 09:22:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-03 09:22:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-03 09:22:19,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:19,773 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-03 09:22:19,773 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:22:19,773 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-10-03 09:22:19,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:19,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:19,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:19,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:19,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:22:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:22:20,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:22:20,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:22:20,073 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:22:20,089 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:22:20,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:22:20,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:22:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:22:20,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:22:20,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 09:22:20,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 09:22:20,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 09:22:20,232 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:22:20,232 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-03 09:22:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:22:20,323 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 09:22:20,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 09:22:20,324 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-03 09:22:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:22:20,325 INFO L225 Difference]: With dead ends: 29 [2018-10-03 09:22:20,325 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 09:22:20,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 23 [2018-10-03 09:22:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 09:22:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 09:22:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 09:22:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 09:22:20,329 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-03 09:22:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:22:20,329 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 09:22:20,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 09:22:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 09:22:20,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 09:22:20,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:22:20,330 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-03 09:22:20,331 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:22:20,332 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:22:20,332 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-10-03 09:22:20,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:22:20,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:22:20,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:20,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:22:20,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:22:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:22:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:22:20,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:22:20,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:22:20,598 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:23:35,302 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 09:23:35,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:23:35,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:23:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:23:35,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:23:35,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 09:23:35,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 09:23:35,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 09:23:35,979 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:23:35,979 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-03 09:23:36,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:36,013 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-03 09:23:36,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 09:23:36,013 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-03 09:23:36,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:36,014 INFO L225 Difference]: With dead ends: 30 [2018-10-03 09:23:36,014 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 09:23:36,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 24 [2018-10-03 09:23:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 09:23:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 09:23:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 09:23:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-03 09:23:36,018 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-03 09:23:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:36,019 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-03 09:23:36,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 09:23:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-03 09:23:36,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 09:23:36,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:36,020 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-03 09:23:36,020 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:23:36,020 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:36,020 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-10-03 09:23:36,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:36,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:36,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:36,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:23:36,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:23:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:23:36,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:23:36,297 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 [2018-10-03 09:23:36,305 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:23:43,945 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 09:23:43,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:23:43,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:23:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:23:44,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:23:44,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 09:23:44,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 09:23:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 09:23:44,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:23:44,062 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-03 09:23:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:44,139 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 09:23:44,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 09:23:44,139 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-03 09:23:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:44,140 INFO L225 Difference]: With dead ends: 31 [2018-10-03 09:23:44,140 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 09:23:44,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 25 [2018-10-03 09:23:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 09:23:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 09:23:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 09:23:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 09:23:44,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-03 09:23:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:44,149 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 09:23:44,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 09:23:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 09:23:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 09:23:44,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:44,150 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-03 09:23:44,151 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:23:44,151 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:44,151 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-10-03 09:23:44,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:44,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:44,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:44,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:23:44,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:23:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:23:44,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:23:44,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:23:44,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:23:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:23:44,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:23:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:23:44,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:23:44,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 09:23:44,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 09:23:44,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 09:23:44,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:23:44,643 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-03 09:23:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:44,695 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-03 09:23:44,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 09:23:44,696 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-03 09:23:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:44,696 INFO L225 Difference]: With dead ends: 32 [2018-10-03 09:23:44,696 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 09:23:44,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 26 [2018-10-03 09:23:44,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 09:23:44,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-03 09:23:44,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 09:23:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-03 09:23:44,700 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-03 09:23:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:44,700 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-03 09:23:44,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 09:23:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-03 09:23:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 09:23:44,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:44,701 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-03 09:23:44,701 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:23:44,701 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:44,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-10-03 09:23:44,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:44,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:44,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:44,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:23:44,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:23:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:23:45,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:23:45,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:23:45,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:23:45,216 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:23:45,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:23:45,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:23:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:23:45,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:23:45,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 09:23:45,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 09:23:45,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 09:23:45,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:23:45,315 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-03 09:23:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:23:45,399 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 09:23:45,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 09:23:45,400 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-03 09:23:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:23:45,401 INFO L225 Difference]: With dead ends: 33 [2018-10-03 09:23:45,401 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 09:23:45,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 27 [2018-10-03 09:23:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 09:23:45,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 09:23:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 09:23:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 09:23:45,405 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-03 09:23:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:23:45,405 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 09:23:45,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 09:23:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 09:23:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 09:23:45,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:23:45,406 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-03 09:23:45,406 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:23:45,406 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:23:45,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-10-03 09:23:45,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:23:45,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:23:45,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:45,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:23:45,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:23:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:23:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:23:46,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:23:46,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:23:46,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:24:40,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 09:24:40,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:24:40,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:24:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:24:40,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:24:40,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 09:24:40,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 09:24:40,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 09:24:40,389 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:24:40,389 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-03 09:24:40,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:24:40,426 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-03 09:24:40,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 09:24:40,427 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-03 09:24:40,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:24:40,427 INFO L225 Difference]: With dead ends: 34 [2018-10-03 09:24:40,427 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 09:24:40,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 28 [2018-10-03 09:24:40,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 09:24:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 09:24:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 09:24:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-03 09:24:40,432 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-03 09:24:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:24:40,433 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-03 09:24:40,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 09:24:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-03 09:24:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-03 09:24:40,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:24:40,433 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-03 09:24:40,434 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:24:40,434 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:24:40,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-10-03 09:24:40,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:24:40,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:24:40,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:40,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:24:40,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:24:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:24:40,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:24:40,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:24:40,905 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:24:40,921 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:24:40,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:24:40,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:24:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:24:41,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:24:41,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 09:24:41,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 09:24:41,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 09:24:41,017 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:24:41,017 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-03 09:24:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:24:41,072 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 09:24:41,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 09:24:41,073 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-03 09:24:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:24:41,073 INFO L225 Difference]: With dead ends: 35 [2018-10-03 09:24:41,073 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 09:24:41,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 29 [2018-10-03 09:24:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 09:24:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 09:24:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 09:24:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 09:24:41,077 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-03 09:24:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:24:41,077 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 09:24:41,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 09:24:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 09:24:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 09:24:41,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:24:41,078 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-03 09:24:41,078 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:24:41,079 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:24:41,079 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-10-03 09:24:41,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:24:41,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:24:41,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:41,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:24:41,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:24:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:24:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:24:41,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:24:41,517 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 [2018-10-03 09:24:41,525 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown