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/20170304-DifficultPathPrograms/jain_5.i_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:50:35,117 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:50:35,119 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:50:35,133 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:50:35,134 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:50:35,135 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:50:35,138 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:50:35,141 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:50:35,144 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:50:35,145 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:50:35,148 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:50:35,148 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:50:35,149 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:50:35,150 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:50:35,152 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:50:35,153 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:50:35,154 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:50:35,156 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:50:35,158 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:50:35,160 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:50:35,161 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:50:35,162 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:50:35,165 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:50:35,174 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:50:35,190 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:50:35,190 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:50:35,191 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:50:35,191 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:50:35,192 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:50:35,192 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:50:35,192 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:50:35,193 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:50:35,193 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:50:35,193 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:50:35,193 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:50:35,193 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:50:35,194 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:50:35,194 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:50:35,194 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:50:35,194 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:50:35,194 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:50:35,195 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:50:35,195 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:50:35,195 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:50:35,195 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:50:35,195 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:50:35,196 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:50:35,196 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:50:35,196 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:50:35,196 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:50:35,197 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:50:35,197 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:50:35,197 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:50:35,197 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:50:35,197 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:50:35,241 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:50:35,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:50:35,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:50:35,260 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:50:35,260 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:50:35,261 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl [2018-09-26 21:50:35,262 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl' [2018-09-26 21:50:35,313 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:50:35,317 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:50:35,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:50:35,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:50:35,318 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:50:35,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:50:35" (1/1) ... [2018-09-26 21:50:35,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:50:35" (1/1) ... [2018-09-26 21:50:35,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:50:35,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:50:35,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:50:35,359 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:50:35,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:50:35" (1/1) ... [2018-09-26 21:50:35,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:50:35" (1/1) ... [2018-09-26 21:50:35,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:50:35" (1/1) ... [2018-09-26 21:50:35,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:50:35" (1/1) ... [2018-09-26 21:50:35,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:50:35" (1/1) ... [2018-09-26 21:50:35,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:50:35" (1/1) ... [2018-09-26 21:50:35,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:50:35" (1/1) ... [2018-09-26 21:50:35,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:50:35,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:50:35,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:50:35,381 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:50:35,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:50:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:50:35,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:50:35,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:50:35,685 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:50:35,686 INFO L202 PluginConnector]: Adding new model jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:50:35 BoogieIcfgContainer [2018-09-26 21:50:35,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:50:35,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:50:35,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:50:35,694 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:50:35,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:50:35" (1/2) ... [2018-09-26 21:50:35,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3624d228 and model type jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:50:35, skipping insertion in model container [2018-09-26 21:50:35,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:50:35" (2/2) ... [2018-09-26 21:50:35,699 INFO L112 eAbstractionObserver]: Analyzing ICFG jain_5.i_2.bpl [2018-09-26 21:50:35,712 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:50:35,721 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:50:35,776 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:50:35,777 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:50:35,777 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:50:35,778 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:50:35,778 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:50:35,778 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:50:35,778 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:50:35,778 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:50:35,779 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:50:35,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:50:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:50:35,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:35,801 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:50:35,802 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:35,810 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:35,810 INFO L82 PathProgramCache]: Analyzing trace with hash 925701, now seen corresponding path program 1 times [2018-09-26 21:50:35,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:35,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:35,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:35,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:35,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:36,028 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:50:36,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:50:36,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:50:36,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:50:36,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:36,048 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2018-09-26 21:50:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:36,315 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-09-26 21:50:36,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:50:36,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-26 21:50:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:36,327 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:50:36,327 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:50:36,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:50:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-09-26 21:50:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:50:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:50:36,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 21:50:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:36,369 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:50:36,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:50:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:50:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:50:36,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:36,370 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 21:50:36,370 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:36,370 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:36,371 INFO L82 PathProgramCache]: Analyzing trace with hash 889531649, now seen corresponding path program 1 times [2018-09-26 21:50:36,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:36,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:36,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:36,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:36,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:36,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:36,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:36,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:36,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:37,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:37,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-09-26 21:50:37,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:50:37,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:50:37,072 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:37,072 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 10 states. [2018-09-26 21:50:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:37,502 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-26 21:50:37,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:50:37,503 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-09-26 21:50:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:37,504 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:50:37,504 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:50:37,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:50:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-09-26 21:50:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:50:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:50:37,512 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-26 21:50:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:37,515 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:50:37,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:50:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:50:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:50:37,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:37,516 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-26 21:50:37,516 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:37,516 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:37,517 INFO L82 PathProgramCache]: Analyzing trace with hash 141355773, now seen corresponding path program 2 times [2018-09-26 21:50:37,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:37,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:37,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:37,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:37,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:37,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:37,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:37,914 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:50:37,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:50:37,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:37,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:38,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:38,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-26 21:50:38,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:50:38,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:50:38,377 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:38,377 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 12 states. [2018-09-26 21:50:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:39,076 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-26 21:50:39,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:50:39,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2018-09-26 21:50:39,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:39,077 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:50:39,077 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:50:39,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:50:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-09-26 21:50:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:50:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:50:39,082 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-26 21:50:39,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:39,083 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:50:39,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:50:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:50:39,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:50:39,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:39,084 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-26 21:50:39,084 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:39,085 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:39,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1596122631, now seen corresponding path program 3 times [2018-09-26 21:50:39,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:39,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:39,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:39,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:39,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:39,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:39,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:39,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:50:39,353 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:50:39,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:39,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:39,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:39,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-26 21:50:39,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:50:39,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:50:39,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:39,610 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 14 states. [2018-09-26 21:50:40,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:40,314 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-26 21:50:40,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:50:40,315 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-26 21:50:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:40,315 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:50:40,316 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:50:40,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:50:40,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-09-26 21:50:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:50:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:50:40,321 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-26 21:50:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:40,321 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:50:40,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:50:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:50:40,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:50:40,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:40,322 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-26 21:50:40,322 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:40,323 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash -570590731, now seen corresponding path program 4 times [2018-09-26 21:50:40,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:40,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:40,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:40,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:40,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:40,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:40,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:40,522 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:50:40,539 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:50:40,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:40,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:40,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:40,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-26 21:50:40,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:50:40,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:50:40,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:40,889 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 16 states. [2018-09-26 21:50:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:41,490 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-26 21:50:41,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:50:41,491 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-26 21:50:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:41,492 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:50:41,492 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:50:41,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:50:41,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-09-26 21:50:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:50:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:50:41,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-26 21:50:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:41,499 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:50:41,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:50:41,499 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:50:41,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:50:41,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:41,500 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-26 21:50:41,501 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:41,501 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:41,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1418054385, now seen corresponding path program 5 times [2018-09-26 21:50:41,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:41,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:41,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:41,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:41,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:41,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:41,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:41,828 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:50:56,527 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:50:56,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:56,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:57,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:57,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-26 21:50:57,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:50:57,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:50:57,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:57,100 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 18 states. [2018-09-26 21:50:57,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:57,871 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-26 21:50:57,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:50:57,871 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2018-09-26 21:50:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:57,873 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:50:57,873 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:50:57,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:50:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-09-26 21:50:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:50:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:50:57,879 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-26 21:50:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:57,879 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:50:57,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:50:57,880 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:50:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:50:57,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:57,880 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-26 21:50:57,881 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:57,881 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1245564141, now seen corresponding path program 6 times [2018-09-26 21:50:57,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:57,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:57,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:57,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:57,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:58,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:58,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:58,099 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:51:10,419 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:51:10,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:10,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:10,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:10,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-26 21:51:10,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:51:10,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:51:10,715 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:10,715 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 20 states. [2018-09-26 21:51:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:11,741 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-26 21:51:11,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:51:11,741 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 16 [2018-09-26 21:51:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:11,743 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:51:11,743 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:51:11,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:11,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:51:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-09-26 21:51:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:51:11,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:51:11,750 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-26 21:51:11,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:11,751 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:51:11,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:51:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:51:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:51:11,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:11,752 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-26 21:51:11,752 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:11,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:11,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1308803095, now seen corresponding path program 7 times [2018-09-26 21:51:11,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:11,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:11,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:11,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:11,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:12,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:12,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:12,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:12,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:12,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:12,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-26 21:51:12,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:51:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:51:12,531 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:12,531 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 22 states. [2018-09-26 21:51:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:14,075 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-26 21:51:14,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:51:14,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 18 [2018-09-26 21:51:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:14,077 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:51:14,077 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:51:14,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:51:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-09-26 21:51:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:51:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:51:14,083 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-26 21:51:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:14,083 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:51:14,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:51:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:51:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:51:14,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:14,084 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-26 21:51:14,084 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:14,085 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:14,085 INFO L82 PathProgramCache]: Analyzing trace with hash 665576421, now seen corresponding path program 8 times [2018-09-26 21:51:14,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:14,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:14,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:14,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:14,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:14,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:14,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:14,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:51:14,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:51:14,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:14,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:16,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:16,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-09-26 21:51:16,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:51:16,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:51:16,346 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:16,346 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 24 states. [2018-09-26 21:51:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:18,097 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-26 21:51:18,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:51:18,099 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2018-09-26 21:51:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:18,100 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:51:18,100 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:51:18,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:51:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-09-26 21:51:18,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:51:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:51:18,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-26 21:51:18,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:18,108 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:51:18,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:51:18,109 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:51:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:51:18,109 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:18,110 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-26 21:51:18,110 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:18,110 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:18,110 INFO L82 PathProgramCache]: Analyzing trace with hash -331253535, now seen corresponding path program 9 times [2018-09-26 21:51:18,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:18,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:18,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:18,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:18,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:18,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:18,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:18,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:51:23,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-26 21:51:23,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:23,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:23,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:23,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-09-26 21:51:23,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:51:23,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:51:23,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:23,766 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 26 states. [2018-09-26 21:51:25,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:25,658 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-26 21:51:25,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:51:25,658 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 22 [2018-09-26 21:51:25,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:25,659 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:51:25,659 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:51:25,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:25,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:51:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-09-26 21:51:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:51:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:51:25,668 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-26 21:51:25,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:25,668 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:51:25,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:51:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:51:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:51:25,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:25,669 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-26 21:51:25,669 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:25,669 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:25,669 INFO L82 PathProgramCache]: Analyzing trace with hash -507134243, now seen corresponding path program 10 times [2018-09-26 21:51:25,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:25,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:25,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:25,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:25,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:26,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:26,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:26,380 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:51:26,397 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:51:26,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:26,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:27,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:27,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-09-26 21:51:27,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:51:27,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:51:27,110 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:27,110 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 28 states. [2018-09-26 21:51:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:29,340 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-26 21:51:29,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:51:29,340 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 24 [2018-09-26 21:51:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:29,341 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:51:29,342 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:51:29,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:29,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:51:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-09-26 21:51:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:51:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:51:29,351 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-26 21:51:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:29,351 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:51:29,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:51:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:51:29,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:51:29,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:29,352 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-26 21:51:29,352 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:29,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:29,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2024770087, now seen corresponding path program 11 times [2018-09-26 21:51:29,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:29,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:29,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:29,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:29,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:29,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:29,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:29,806 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:53:02,795 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:53:02,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:53:02,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:53:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:53:03,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:53:03,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-09-26 21:53:03,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:53:03,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:53:03,626 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:53:03,626 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 30 states. [2018-09-26 21:53:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:53:06,745 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-26 21:53:06,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:53:06,746 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 26 [2018-09-26 21:53:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:53:06,746 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:53:06,746 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:53:06,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:53:06,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:53:06,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-09-26 21:53:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:53:06,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:53:06,755 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-26 21:53:06,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:53:06,755 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:53:06,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:53:06,755 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:53:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:53:06,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:53:06,756 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-26 21:53:06,757 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:53:06,757 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:53:06,757 INFO L82 PathProgramCache]: Analyzing trace with hash -183935531, now seen corresponding path program 12 times [2018-09-26 21:53:06,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:53:06,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:53:06,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:53:06,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:53:06,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:53:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:53:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:53:07,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:53:07,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:53:07,794 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:54:11,445 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:54:11,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:12,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:13,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:13,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-09-26 21:54:13,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:54:13,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:54:13,005 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:13,005 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 32 states. [2018-09-26 21:54:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:16,368 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-26 21:54:16,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:54:16,375 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 28 [2018-09-26 21:54:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:16,375 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:54:16,375 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:54:16,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:54:16,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-09-26 21:54:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:54:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:54:16,385 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-26 21:54:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:16,386 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:54:16,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:54:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:54:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:54:16,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:16,387 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-26 21:54:16,387 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:16,387 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash -668453167, now seen corresponding path program 13 times [2018-09-26 21:54:16,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:16,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:16,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:16,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:16,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:16,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:16,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:16,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:16,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:17,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:17,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-09-26 21:54:17,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:54:17,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:54:17,733 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:17,733 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 34 states. [2018-09-26 21:54:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:21,466 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-26 21:54:21,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:54:21,466 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 30 [2018-09-26 21:54:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:21,467 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:54:21,467 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:54:21,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:54:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-09-26 21:54:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:54:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:54:21,477 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-26 21:54:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:21,477 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:54:21,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:54:21,477 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:54:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:54:21,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:21,478 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-26 21:54:21,479 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:21,479 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:21,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1861533901, now seen corresponding path program 14 times [2018-09-26 21:54:21,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:21,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:21,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:21,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:21,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:22,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:22,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:22,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:54:22,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:54:22,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:22,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:23,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:23,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-09-26 21:54:23,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:54:23,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:54:23,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:23,373 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 36 states. [2018-09-26 21:54:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:27,546 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-26 21:54:27,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:54:27,546 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 32 [2018-09-26 21:54:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:27,547 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:54:27,547 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:54:27,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:54:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-09-26 21:54:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:54:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:54:27,559 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-26 21:54:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:27,559 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:54:27,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:54:27,560 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:54:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:54:27,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:27,561 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-26 21:54:27,561 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:27,561 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:27,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2067350583, now seen corresponding path program 15 times [2018-09-26 21:54:27,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:27,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:27,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:27,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:27,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:28,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:28,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:28,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown